diff --git a/.gitignore b/.gitignore
index b5dec787d9c..e9d76713780 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@ npm-*
 
 # Downloaded during "npm install"
 /static/microbit
+/static/microbitMore
 
 # for act
 .secrets
diff --git a/scripts/prepublish.mjs b/scripts/prepublish.mjs
index a2afb4da16a..4db790eece6 100644
--- a/scripts/prepublish.mjs
+++ b/scripts/prepublish.mjs
@@ -110,8 +110,44 @@ const downloadMicrobitHex = async () => {
     console.info(`Wrote ${relativeGeneratedFile}`);
 };
 
+const downloadMicrobitMoreHex = async () => {
+    const url = 'https://github.com/microbit-more/pxt-mbit-more-v2/releases/download/0.2.5/microbit-mbit-more-v2-0_2_5.hex';
+    console.info(`Downloading ${url}`);
+    const response = await crossFetch(url);
+    const hexBuffer = Buffer.from(await response.arrayBuffer());
+    const relativeHexDir = path.join('static', 'microbitMore');
+    const hexFileName = 'microbit-mbit-more-v2-0_2_5.hex';
+    const relativeHexFile = path.join(relativeHexDir, hexFileName);
+    const absoluteDestDir = path.join(basePath, relativeHexDir);
+    fs.mkdirSync(absoluteDestDir, {recursive: true});
+    const absoluteDestFile = path.join(basePath, relativeHexFile);
+    fs.writeFileSync(absoluteDestFile, hexBuffer);
+
+    const relativeGeneratedDir = path.join('src', 'generated');
+    const relativeGeneratedFile = path.join(relativeGeneratedDir, 'microbit-more-hex-url.cjs');
+    const absoluteGeneratedDir = path.join(basePath, relativeGeneratedDir);
+    fs.mkdirSync(absoluteGeneratedDir, {recursive: true});
+    const absoluteGeneratedFile = path.join(basePath, relativeGeneratedFile);
+    const requirePath = `./${path
+        .relative(relativeGeneratedDir, relativeHexFile)
+        .split(path.win32.sep)
+        .join(path.posix.sep)}`;
+    fs.writeFileSync(
+        absoluteGeneratedFile,
+        [
+            '// This file is generated by scripts/prepublish.mjs',
+            '// Do not edit this file directly',
+            '// This file relies on a loader to turn this `require` into a URL',
+            `module.exports = require('${requirePath}');`,
+            '' // final newline
+        ].join('\n')
+    );
+    console.info(`Wrote ${relativeGeneratedFile}`);
+};
+
 const prepublish = async () => {
     await downloadMicrobitHex();
+    await downloadMicrobitMoreHex();
 };
 
 prepublish().then(
diff --git a/src/components/connection-modal/connection-modal.css b/src/components/connection-modal/connection-modal.css
index 891ce07741c..c45b83ed688 100644
--- a/src/components/connection-modal/connection-modal.css
+++ b/src/components/connection-modal/connection-modal.css
@@ -446,3 +446,8 @@
     height: 60%;
     width: inherit;
 }
+
+.important-instruction {
+    font-weight: bold;
+    color: $ui-red;
+}
diff --git a/src/components/connection-modal/connection-modal.jsx b/src/components/connection-modal/connection-modal.jsx
index 3a7f09b259d..8ddc7366a9b 100644
--- a/src/components/connection-modal/connection-modal.jsx
+++ b/src/components/connection-modal/connection-modal.jsx
@@ -39,8 +39,20 @@ const ConnectionModalComponent = props => (
             {props.phase === PHASES.scanning && props.useAutoScan && <AutoScanningStep {...props} />}
             {props.phase === PHASES.connecting && <ConnectingStep {...props} />}
             {props.phase === PHASES.connected && <ConnectedStep {...props} />}
-            {props.phase === PHASES.error && <ErrorStep {...props} />}
-            {props.phase === PHASES.unavailable && <UnavailableStep {...props} />}
+            {props.phase === PHASES.error && (
+                <ErrorStep
+                    {...props}
+                    onScanning={props.onScanning}
+                    onUpdatePeripheral={props.onUpdatePeripheral}
+                />
+            )}
+            {props.phase === PHASES.unavailable && (
+                <UnavailableStep
+                    {...props}
+                    onScanning={props.onScanning}
+                    onUpdatePeripheral={props.onUpdatePeripheral}
+                />
+            )}
             {props.phase === PHASES.updatePeripheral && <UpdatePeripheralStep {...props} />}
         </Box>
     </Modal>
@@ -55,6 +67,8 @@ ConnectionModalComponent.propTypes = {
     name: PropTypes.node,
     onCancel: PropTypes.func.isRequired,
     onHelp: PropTypes.func.isRequired,
+    onScanning: PropTypes.func,
+    onUpdatePeripheral: PropTypes.func,
     phase: PropTypes.oneOf(Object.keys(PHASES)).isRequired,
     title: PropTypes.string.isRequired,
     useAutoScan: PropTypes.bool.isRequired
diff --git a/src/components/connection-modal/error-step.jsx b/src/components/connection-modal/error-step.jsx
index f91cb537e53..ec3f6d1a57e 100644
--- a/src/components/connection-modal/error-step.jsx
+++ b/src/components/connection-modal/error-step.jsx
@@ -7,6 +7,7 @@ import Box from '../box/box.jsx';
 import Dots from './dots.jsx';
 import helpIcon from './icons/help.svg';
 import backIcon from './icons/back.svg';
+import enterUpdateIcon from './icons/enter-update.svg';
 
 import styles from './connection-modal.css';
 
@@ -30,6 +31,15 @@ const ErrorStep = props => (
                     id="gui.connection.error.errorMessage"
                 />
             </div>
+            {props.onUpdatePeripheral && (
+                <div className={classNames(styles.bottomAreaItem, styles.instructions)}>
+                    <FormattedMessage
+                        defaultMessage="If you don't see your device, you may need to update it to work with Scratch."
+                        description="Prompt for updating a peripheral device"
+                        id="gui.connection.scanning.updatePeripheralPrompt"
+                    />
+                </div>
+            )}
             <Dots
                 error
                 className={styles.bottomAreaItem}
@@ -50,6 +60,22 @@ const ErrorStep = props => (
                         id="gui.connection.error.tryagainbutton"
                     />
                 </button>
+                {props.onUpdatePeripheral && (
+                    <button
+                        className={styles.connectionButton}
+                        onClick={props.onUpdatePeripheral}
+                    >
+                        <FormattedMessage
+                            defaultMessage="Update my Device"
+                            description="Button to enter the peripheral update mode"
+                            id="gui.connection.scanning.updatePeripheralButton"
+                        />
+                        <img
+                            className={styles.buttonIconRight}
+                            src={enterUpdateIcon}
+                        />
+                    </button>
+                )}
                 <button
                     className={styles.connectionButton}
                     onClick={props.onHelp}
@@ -72,7 +98,8 @@ const ErrorStep = props => (
 ErrorStep.propTypes = {
     connectionIconURL: PropTypes.string.isRequired,
     onHelp: PropTypes.func,
-    onScanning: PropTypes.func
+    onScanning: PropTypes.func,
+    onUpdatePeripheral: PropTypes.func
 };
 
 export default ErrorStep;
diff --git a/src/components/connection-modal/unavailable-step.jsx b/src/components/connection-modal/unavailable-step.jsx
index 9f45f0c10fa..6e4fb7bb07b 100644
--- a/src/components/connection-modal/unavailable-step.jsx
+++ b/src/components/connection-modal/unavailable-step.jsx
@@ -10,6 +10,8 @@ import backIcon from './icons/back.svg';
 import bluetoothIcon from './icons/bluetooth.svg';
 import scratchLinkIcon from './icons/scratchlink.svg';
 
+import enterUpdateIcon from './icons/enter-update.svg';
+
 import styles from './connection-modal.css';
 
 const UnavailableStep = props => (
@@ -55,6 +57,15 @@ const UnavailableStep = props => (
             </div>
         </Box>
         <Box className={styles.bottomArea}>
+            <Box className={classNames(styles.bottomAreaItem, styles.instructions)}>
+                {props.onUpdatePeripheral && (
+                    <FormattedMessage
+                        defaultMessage="If you don't see your device, you may need to update it to work with Scratch."
+                        description="Prompt for updating a peripheral device"
+                        id="gui.connection.scanning.updatePeripheralPrompt"
+                    />
+                )}
+            </Box>
             <Dots
                 error
                 className={styles.bottomAreaItem}
@@ -75,6 +86,22 @@ const UnavailableStep = props => (
                         id="gui.connection.unavailable.tryagainbutton"
                     />
                 </button>
+                {props.onUpdatePeripheral && (
+                    <button
+                        className={styles.connectionButton}
+                        onClick={props.onUpdatePeripheral}
+                    >
+                        <FormattedMessage
+                            defaultMessage="Update my Device"
+                            description="Button to enter the peripheral update mode"
+                            id="gui.connection.scanning.updatePeripheralButton"
+                        />
+                        <img
+                            className={styles.buttonIconRight}
+                            src={enterUpdateIcon}
+                        />
+                    </button>
+                )}
                 <button
                     className={styles.connectionButton}
                     onClick={props.onHelp}
@@ -96,7 +123,8 @@ const UnavailableStep = props => (
 
 UnavailableStep.propTypes = {
     onHelp: PropTypes.func,
-    onScanning: PropTypes.func
+    onScanning: PropTypes.func,
+    onUpdatePeripheral: PropTypes.func
 };
 
 export default UnavailableStep;
diff --git a/src/components/connection-modal/update-peripheral-step.jsx b/src/components/connection-modal/update-peripheral-step.jsx
index cc65ea347f5..653aab71d82 100644
--- a/src/components/connection-modal/update-peripheral-step.jsx
+++ b/src/components/connection-modal/update-peripheral-step.jsx
@@ -136,11 +136,36 @@ class UpdatePeripheralStep extends React.Component {
     renderResults () {
         let resultsContent;
         if (this.state.err === null) {
-            resultsContent = (<FormattedMessage
-                defaultMessage="Update successful!"
-                description="Message to indicate that the peripheral update was successful"
-                id="gui.connection.updatePeripheral.updateSuccessful"
-            />);
+            if (this.props.extensionId === 'microbitMore') {
+                resultsContent = (
+                    <Box className={styles.scratchLinkError}>
+                        <Box className={styles.centeredRow}>
+                            <FormattedMessage
+                                defaultMessage="MicrobitMore update successful!"
+                                description="Message to indicate that the MicrobitMore update was successful"
+                                id="gui.connection.updatePeripheral.microbitMoreUpdateSuccessful"
+                            />
+                        </Box>
+                        <Box className={classNames(styles.centeredRow, styles.importantInstruction)}>
+                            <FormattedMessage
+                                defaultMessage="Tilt your micro:bit to light up all 25 LEDs to complete."
+                                description="Instructions to tilt the micro:bit to complete the update process"
+                                id="gui.connection.updatePeripheral.microbitMoreTiltToLightUp"
+                            />
+                        </Box>
+                    </Box>
+                );
+            } else {
+                resultsContent = (
+                    <Box className={styles.centeredRow}>
+                        <FormattedMessage
+                            defaultMessage="Update successful!"
+                            description="Message to indicate that the peripheral update was successful"
+                            id="gui.connection.updatePeripheral.updateSuccessful"
+                        />
+                    </Box>
+                );
+            }
         } else if (this.state.err.message === 'No valid interfaces found.') {
             // this is a special case where the micro:bit's communication firmware is too old to support WebUSB
             resultsContent = (<BalancedFormattedMessage
@@ -160,12 +185,13 @@ class UpdatePeripheralStep extends React.Component {
         } else {
             resultsContent = (
                 <Box className={styles.scratchLinkError}>
-                    <FormattedMessage
-                        className={styles.centeredRow}
-                        defaultMessage="Update failed."
-                        description="Message to indicate that the peripheral update failed"
-                        id="gui.connection.updatePeripheral.updateFailed"
-                    />
+                    <Box className={styles.centeredRow}>
+                        <FormattedMessage
+                            defaultMessage="Update failed."
+                            description="Message to indicate that the peripheral update failed"
+                            id="gui.connection.updatePeripheral.updateFailed"
+                        />
+                    </Box>
                     <textarea
                         className={styles.scratchLinkErrorDetails}
                         readOnly
@@ -254,6 +280,7 @@ class UpdatePeripheralStep extends React.Component {
 
 UpdatePeripheralStep.propTypes = {
     connectionSmallIconURL: PropTypes.string,
+    extensionId: PropTypes.string,
     name: PropTypes.string.isRequired,
     onScanning: PropTypes.func.isRequired,
     onSendPeripheralUpdate: PropTypes.func.isRequired
diff --git a/src/containers/connection-modal.jsx b/src/containers/connection-modal.jsx
index fbb08c4a3b9..3f29bc185c3 100644
--- a/src/containers/connection-modal.jsx
+++ b/src/containers/connection-modal.jsx
@@ -9,6 +9,10 @@ import {connect} from 'react-redux';
 
 import {closeConnectionModal} from '../reducers/modals';
 import {isMicroBitUpdateSupported, selectAndUpdateMicroBit} from '../lib/microbit-update';
+import {
+    isMicroBitUpdateSupported as isMicroBitMoreUpdateSupported,
+    selectAndUpdateMicroBit as selectAndUpdateMicroBitMore
+} from '../lib/microbit-more-update';
 
 class ConnectionModal extends React.Component {
     constructor (props) {
@@ -141,11 +145,15 @@ class ConnectionModal extends React.Component {
             label: this.props.extensionId
         });
 
-        // TODO: get this functionality from the extension
+        if (this.props.extensionId === 'microbitMore') {
+            return selectAndUpdateMicroBitMore(progressCallback);
+        }
         return selectAndUpdateMicroBit(progressCallback);
     }
     render () {
-        const canUpdatePeripheral = (this.props.extensionId === 'microbit') && isMicroBitUpdateSupported();
+        const canUpdatePeripheral =
+            (this.props.extensionId === 'microbit' && isMicroBitUpdateSupported()) ||
+            (this.props.extensionId === 'microbitMore' && isMicroBitMoreUpdateSupported());
         return (
             <ConnectionModalComponent
                 connectingMessage={this.state.extension && this.state.extension.connectingMessage}
diff --git a/src/css/colors.css b/src/css/colors.css
index 538d4e8d032..d0855c08eef 100644
--- a/src/css/colors.css
+++ b/src/css/colors.css
@@ -15,6 +15,8 @@ $ui-black-transparent-10: hsla(0, 0%, 0%, 0.10); /* 10% transparent version of b
 $ui-green: hsla(163, 85%, 35%, 1); /* #0DA57A */
 $ui-green-2: hsla(163, 85%, 40%, 1); /* #0FBD8C */
 
+$ui-red: hsla(0, 100%, 50%, 1); /* #FF0000 */
+
 $text-primary: hsla(225, 15%, 40%, 1); /* #575E75 */
 $text-primary-transparent: hsla(225, 15%, 40%, 0.75);
 
diff --git a/src/lib/microbit-more-update.js b/src/lib/microbit-more-update.js
new file mode 100644
index 00000000000..8a3600d16af
--- /dev/null
+++ b/src/lib/microbit-more-update.js
@@ -0,0 +1,164 @@
+import {
+    isUniversalHex,
+    separateUniversalHex
+} from '@microbit/microbit-universal-hex';
+import {WebUSB, DAPLink} from 'dapjs';
+import keyMirror from 'keymirror';
+
+import log from './log.js';
+
+import hexUrl from '../generated/microbit-more-hex-url.cjs';
+
+/**
+ * @typedef {import('@microbit/microbit-universal-hex').IndividualHex} IndividualHex
+ */
+
+/**
+ * The version of a micro:bit.
+ * @enum {string}
+ */
+const DeviceVersion = keyMirror({
+    V1: null,
+    V2: null
+});
+
+const vendorId = 0x0d28;
+const productId = 0x0204;
+
+/**
+ * Assumes the device is a micro:bit and determines its version.
+ * @param {USBDevice} device The USB device to check.
+ * @returns {DeviceVersion} The version of the device.
+ * @throws {Error} If the device is not a recognized micro:bit or is V1.
+ */
+const getDeviceVersion = device => {
+    const microBitBoardId = device?.serialNumber?.substring(0, 4) ?? '';
+    switch (microBitBoardId) {
+    case '9900':
+    case '9901':
+        throw new Error('MicrobitMore only supports micro:bit V2');
+    case '9903':
+    case '9904':
+    case '9905':
+    case '9906':
+        return DeviceVersion.V2;
+    }
+
+    throw new Error('Could not identify micro:bit board version');
+};
+
+/**
+ * Checks micro:bit board version targetted by the hex file.
+ * @param {IndividualHex} hex The hex file to check.
+ * @returns {DeviceVersion} The version of the hex file.
+ * @throws {Error} If the hex file does not target a recognized micro:bit version.
+ */
+const getHexVersion = hex => {
+    switch (hex.boardId) {
+    case 0x9900:
+    case 0x9901:
+        return DeviceVersion.V1;
+    case 0x9903:
+    case 0x9904:
+    case 0x9905:
+    case 0x9906:
+        return DeviceVersion.V2;
+    }
+
+    throw new Error('Could not identify hex version');
+};
+
+/**
+ * Fetches the hex file and returns a map of micro:bit versions to hex file contents.
+ * @returns {Promise<Map<DeviceVersion, Uint8Array>>} A map of micro:bit versions to hex file contents.
+ */
+const getHexMap = async () => {
+    const response = await fetch(hexUrl);
+    const hex = await response.text();
+
+    const hexMap = new Map();
+    if (isUniversalHex(hex)) {
+        for (const hexObj of separateUniversalHex(hex)) {
+            const version = getHexVersion(hexObj);
+            const binary = new TextEncoder().encode(hexObj.hex);
+            hexMap.set(version, binary);
+        }
+    } else {
+        const binary = new TextEncoder().encode(hex);
+        hexMap.set(DeviceVersion.V2, binary);
+    }
+
+    return hexMap;
+};
+
+/**
+ * Copy the MicrobitMore-specific hex file to the specified micro:bit.
+ * @param {USBDevice} device The micro:bit to update.
+ * @param {function(number): void} [progress] Optional function to call with progress updates in the range of [0..1].
+ * @returns {Promise<void>} A Promise that resolves when the update is completed.
+ * @throws {Error} If anything goes wrong while fetching the hex file or updating the micro:bit.
+ */
+const updateMicroBit = async (device, progress) => {
+    const transport = new WebUSB(device);
+    try {
+        await transport.open();
+    } catch (err) {
+        log.error(`Transport open error: ${err.message}`);
+        throw err;
+    }
+    const target = new DAPLink(transport);
+    if (progress) {
+        target.on(DAPLink.EVENT_PROGRESS, progress);
+    }
+    const version = getDeviceVersion(device);
+    const hexMap = await getHexMap();
+    const hexData = hexMap.get(version);
+    if (!hexData) {
+        throw new Error(`Could not find hex file for micro:bit ${version}`);
+    }
+    await target.connect();
+    try {
+        await target.flash(hexData);
+    } catch (err) {
+        log.error(`Flash error details: ${err.message}`);
+        if (err.stack) {
+            log.error(err.stack);
+        }
+        throw err;
+    } finally {
+        if (target.connected) {
+            await target.disconnect();
+        }
+    }
+};
+
+/**
+ * Requests a micro:bit from the browser then updates it with the MicrobitMore-specific hex file.
+ * The browser is expected to prompt the user to select a micro:bit.
+ * @param {function(number): void} [progress] Optional function to call with progress updates in the range of [0..1].
+ * @returns {Promise<void>} A Promise that resolves when the update is completed.
+ * @throws {Error} If anything goes wrong while fetching the hex file or updating the micro:bit.
+ */
+const selectAndUpdateMicroBit = async progress => {
+    const device = await navigator.usb.requestDevice({
+        filters: [{vendorId, productId}]
+    });
+
+    if (!device) {
+        return;
+    }
+
+    return updateMicroBit(device, progress);
+};
+
+/**
+ * Checks if the browser supports updating a micro:bit.
+ * @returns {boolean} True if the browser appears to support updating a micro:bit.
+ */
+const isMicroBitUpdateSupported = () =>
+    !!(navigator.usb && navigator.usb.requestDevice);
+
+export {
+    isMicroBitUpdateSupported,
+    selectAndUpdateMicroBit
+};
diff --git a/src/lib/microbit-update.js b/src/lib/microbit-update.js
index f4230ddb54a..c2d2fde306d 100644
--- a/src/lib/microbit-update.js
+++ b/src/lib/microbit-update.js
@@ -86,7 +86,7 @@ const getHexMap = async () => {
 
     for (const hexObj of separateUniversalHex(hex)) {
         const version = getHexVersion(hexObj);
-        const binary = new TextEncoder().encode(hex);
+        const binary = new TextEncoder().encode(hexObj.hex);
         hexMap.set(version, binary);
     }
 
@@ -103,6 +103,12 @@ const getHexMap = async () => {
 const updateMicroBit = async (device, progress) => {
     log.info(`Connecting to micro:bit`);
     const transport = new WebUSB(device);
+    try {
+        await transport.open();
+    } catch (err) {
+        log.error(`Transport open error: ${err.message}`);
+        throw err;
+    }
     const target = new DAPLink(transport);
     if (progress) {
         target.on(DAPLink.EVENT_PROGRESS, progress);
@@ -120,6 +126,13 @@ const updateMicroBit = async (device, progress) => {
     log.info(`Sending hex file...`);
     try {
         await target.flash(hexData);
+        log.info('Flash completed successfully');
+    } catch (err) {
+        log.error(`Flash error details: ${err.message}`);
+        if (err.stack) {
+            log.error(err.stack);
+        }
+        throw err;
     } finally {
         log.info('Disconnecting');
         if (target.connected) {
diff --git a/src/locales/ja-Hira.js b/src/locales/ja-Hira.js
index 77ed818c791..0628ae61881 100644
--- a/src/locales/ja-Hira.js
+++ b/src/locales/ja-Hira.js
@@ -30,9 +30,9 @@ export default {
     'gui.smalruby3.telemetryOptIn.body1': 'スモウルビーのかいはつしゃはせかいじゅうでスモウルビーがどのようにつかわれているのかをりかいしたいとかんがえています。そのてだすけのために、みなさんのスモウルビーのりようじょうきょうをスモウルビーのかいはつしゃにていきょうしていただけないでしょうか。',
     'gui.smalruby3.telemetryOptIn.body2': 'ていきょうしていただくじょうほうにはどのげんごをせんたくしたか、どのブロックをつかったか、ほぞん・よみこみ・プロジェクトのアップロードなどのイベントをふくみます。ただし、ユーザめいなどのこじんてきなじょうほうはいっさいふくみません。',
     'gui.telemetryOptIn.buttonTextNo': 'いいえ、けっこうです。',
-    'gui.smalruby3.telemetryOptIn.buttonTextYes': 'はい、スモウルビーのかいぜんにきょうりょくします。',
     'gui.smalruby3.rubyToBlocksConverter.couldNotConvertPrimitive': '「{ SOURCE }」はブロックにへんかんできません。',
     'gui.smalruby3.rubyToBlocksConverter.wrongInstruction': '「{ SOURCE }」はめいれいがまちがっています。',
+    'gui.smalruby3.telemetryOptIn.buttonTextYes': 'はい、スモウルビーのかいぜんにきょうりょくします。',
     'gui.smalruby3.extension.mesh.name': 'メッシュ',
     'gui.smalruby3.extension.mesh.description': 'ネットワークじょうでユーザーかんのやりとりを おこなう。',
     'gui.smalruby3.extension.mesh.connectingMessage': 'メッシュのネットワークにせつぞくしています',
@@ -41,8 +41,8 @@ export default {
     'mesh.hostPeripheralName': 'メッシュのホストになる 【{ MESH_ID }】',
     'mesh.clientPeripheralName': 'メッシュにさんかする 【{ MESH_ID }】',
     'gui.smalruby3.extension.meshV2.name': 'メッシュ V2',
-    'mesh.registeredHost': 'ホストとしてメッシュにとうろくしました 【{ MESH_ID }】',
     'mesh.notConnected': 'メッシュにせつぞくしていません',
+    'mesh.registeredHost': 'ホストとしてメッシュにとうろくしました 【{ MESH_ID }】',
     'mesh.joinedMesh': 'メッシュにさんかしました 【{ MESH_ID }】',
     'mesh.notConnectedMenu': '！せつぞくしていません',
     'mesh.registeredHostMenu': '✔【{ MESH_ID }】 ⏳️{ EXPIRES_AT }まで',
@@ -216,5 +216,11 @@ export default {
     'mbitMore.gesturesMenu.tiltUp': 'うえにかたむいた',
     'mbitMore.gesturesMenu.tiltDown': 'したにかたむいた',
     'mbitMore.gesturesMenu.tiltLeft': 'ひだりにかたむいた',
-    'mbitMore.gesturesMenu.tiltRight': 'みぎにかたむいた'
+    'mbitMore.gesturesMenu.tiltRight': 'みぎにかたむいた',
+    'gui.connection.updatePeripheral.doNotDisconnect': 'アップデートちゅうはmicro:bitをはずさないでください。',
+    'gui.connection.scanning.updatePeripheralPrompt': 'micro:bitをさいしんのファームウェアにアップデートしてください。',
+    'gui.connection.updatePeripheral.microbitMoreUpdateSuccessful': 'MicrobitMoreのアップデートにせいこうしました！',
+    'gui.connection.updatePeripheral.microbitMoreTiltToLightUp': 'micro:bitをかたむけて25このLEDをすべててんとうさせるとかんりょうです。',
+    'gui.connection.scanning.updatePeripheralButton': 'アップデート',
+    'gui.connection.auto-scanning.updatePeripheralButton': 'アップデート'
 };
diff --git a/src/locales/ja.js b/src/locales/ja.js
index 8caa949a8fb..c84548fff25 100644
--- a/src/locales/ja.js
+++ b/src/locales/ja.js
@@ -20,7 +20,7 @@ export default {
     'gui.menuBar.aiSaved': 'ルビーが保存されました。',
     'gui.koshienTestModal.title': 'スモウルビー甲子園のAIを試す',
     'gui.googleDriveLoader.loadError': 'Google ドライブからプロジェクトの読み込みに失敗しました。',
-    'gui.googleDriveLoader.authError': 'Google ドライブの認証に失敗しました。もう一度お試しください。',
+    'gui.googleDriveLoader.authError': 'Google ドライブ의 認証に失敗しました。もう一度お試しください。',
     'gui.googleDriveLoader.configError': 'Google ドライブが設定されていません。管理者に連絡してください。',
     'gui.googleDriveLoader.pickerTitle': 'Google ドライブから Scratch 3.0 プロジェクト (.sb3) を選択',
     'gui.googleDriveSaver.uploadError': 'Google ドライブへのプロジェクトのアップロードに失敗しました。',
@@ -117,7 +117,7 @@ export default {
     'smalrubotS1.positionsMenu.left': '左',
     'smalrubotS1.positionsMenu.right': '右',
     'smalrubotS1.sensorPositionsMenu.left': '左 (A4)',
-    'smalrubotS1.sensorPositionsMenu.right': '右 (A5)',
+    'smalruby3.sensorPositionsMenu.right': '右 (A5)',
     'smalrubotS1.sensorPositionsMenu.touch': 'タッチ (A2)',
     'smalrubotS1.sensorPositionsMenu.light': '光 (A6)',
     'smalrubotS1.sensorPositionsMenu.sound': '音 (A7)',
@@ -253,5 +253,11 @@ export default {
     'mbitMore.gesturesMenu.tiltUp': '上に傾いた',
     'mbitMore.gesturesMenu.tiltDown': '下に傾いた',
     'mbitMore.gesturesMenu.tiltLeft': '左に傾いた',
-    'mbitMore.gesturesMenu.tiltRight': '右に傾いた'
+    'mbitMore.gesturesMenu.tiltRight': '右に傾いた',
+    'gui.connection.updatePeripheral.doNotDisconnect': 'アップデート中はmicro:bitを外さないでください。',
+    'gui.connection.scanning.updatePeripheralPrompt': 'micro:bitを最新のファームウェアにアップデートしてください。',
+    'gui.connection.updatePeripheral.microbitMoreUpdateSuccessful': 'MicrobitMoreのアップデートに成功しました！',
+    'gui.connection.updatePeripheral.microbitMoreTiltToLightUp': 'micro:bitを傾けて25個のLEDをすべて点灯させると完了です。',
+    'gui.connection.scanning.updatePeripheralButton': 'アップデート',
+    'gui.connection.auto-scanning.updatePeripheralButton': 'アップデート'
 };