2026年 April

9 Best スマートウォッチ in 日本

Last Updated - 02/04/2026

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Best Choice
01

myFirst

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On Amazon

myFirst Fone S4 キッズスマートウォッチ GPSトラッキングビデオ通話 (スペースブルー)
9.8

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

子供を見守るキッズスマートウォッチです。リアルタイムGPS追跡と、ビデオ通話機能を搭載しています。
【音声ビデオ通話】離れても専用アプリで無料ビデオ電話（テレビ電話）を実現。お互いの顔を見ながら話すことができます。お子様が迷子になった際も、GPSトラッキング機能に加えて、本製品を装着したお子様の周囲の様子を映像で確認することで、場所の詳細な特定に役立てることができます。
【月間契約では月額980円】月々980円での月間契約もお選びできます。期間拘束などの制限はなく、データ通信契約の解約はいつでも可能です。料金プランの違いによるその他のサービスの違いはございません。
【年間契約なら年額8,580円・月々715円】本製品は「myFirst FreeSIM」eSIMを採用しています。契約料のみでデータ量無制限で本製品をご使用いただけます。年契約では、月々715円でご利用が可能です（年間契約は途中で解約した場合の部分返金はございません）。データ通信の契約がない場合も、Wi-Fi経由で使用することは可能です。「myFirst FreeSIM」は、無料のデータローミング対応で、日本国外でもお使いいただけます（国・地域によっては使用できないことがあります）。
【SOSボタン】もしもの時にこのボタンを長押しすると、周囲の状況を30秒間録音し、録音データと位置情報を保護者に送信します。
【SNS機能など、多彩な機能を搭載】本製品のSNS機能は、お子様の見知った人のみを登録して利用する形となります。保護者が登録状況を管理することができ、お子様が安全に専用SNSをご利用できます。そのほか、MP3プレイヤー機能（ワイヤレスイヤホンなどとBluetooth接続もできます）なども搭載しています。
【GPS追跡】専用アプリを開いたら、端末をつけているお子様の居場所が一目瞭然。本製品は心拍数モニター機能も搭載しています。小学校に通うようになって、行動範囲が広がったお子様を見守るのに最適です。

￥34,800
02

myFirst

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myFirst Fone S3 キッズスマートウォッチ GPSトラッキングビデオ通話 (SIMなし, コットンキャンディー)
9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

本製品は、SIMを搭載しないnon-SIM版です。既に myFirst Fone をお使いの方の買い替え、myFirst FreeSIM以外の通信契約をご利用したい方向けのバリエーションです。対応しているSIMカード（nano SIM）は、myFirst Japan の公式ウェブサイトでご確認ください。データ通信の契約がない場合も、Wi-Fi経由で使用することは可能です。
子供を見守るキッズスマートウォッチです。リアルタイムGPS追跡と、ビデオ通話機能を搭載しています。
【音声ビデオ通話】離れても専用アプリで無料ビデオ電話（テレビ電話）を実現。お互いの顔を見ながら話すことができます。お子様が迷子になった際も、GPSトラッキング機能に加えて、本製品を装着したお子様の周囲の様子を映像で確認することで、場所の詳細な特定に役立てることができます。
【SOSボタン】もしもの時にこのボタンを長押しすると、周囲の状況を30秒間録音し、録音データと位置情報を保護者に送信します。
【SNS機能など、多彩な機能を搭載】本製品のSNS機能は、お子様の見知った人のみを登録して利用する形となります。保護者が登録状況を管理することができ、お子様が安全に専用SNSをご利用できます。そのほか、MP3プレイヤー機能（ワイヤレスイヤホンなどとBluetooth接続もできます）なども搭載しています。
【GPS追跡】専用アプリを開いたら、端末をつけているお子様の居場所が一目瞭然。本製品は心拍数モニター機能も搭載しています。
※ この商品は、旧ASIN（B0C16PRHWS）のnon-SIM版です。社名変更に伴い、ASINを変更いたしました。

￥15,800
Best Value
03

SAIKATI
92% Off

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Smart Watch, 2025 Improved Performance Mode, Compatible with iPhone, Android, Bluetooth Call Function, 1.83-inch Large Screen, SMS/Line Notifications, Smart Watch, Activity Meter, Thin, Lightweight
9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Long Battery & Supports Over 100 Sports Modes & IP68 Waterproof: Equipped with a large capacity battery that can be used for up to 5 to 7 days on a full charge of about 2.5 hours. The smart watch is equipped with over 100 different exercise modes to fully record various activities such as walking, running, yoga, fitness, basketball and swimming. It accurately monitors your steps, exercise distance and calories burned, making it useful for managing your health and dieting routine. In addition, it is IP68 waterproof rating, so it is safe to use even when washing your hands or face or on rainy days. You can use it without worrying about sweat training. (*Please refrain from using in baths, saunas, or hot springs.)
Keep your health management. Multifunctional Smart Watch for Daily Life: The smart watch monitors your steps, distance traveled, calorie consumption, sleep quality, and stress levels for 24 hours to support your daily health. It also has a reminder and breathing guide to prevent oversitting and menstrual cycle management for women. Not only does it support a healthy lifestyle, it also comes with a variety of functions that are useful in daily life, such as stopwatch, timer, music control, brightness adjustment, and smartphone exploration. Perfect for work or personal use
Compatible Devices: The smart watch is compatible with Android 6.0, iOS 9.0, and Bluetooth 4.0 and above. The Japanese app can be synchronized with the dedicated VeryFit app to check detailed data by day. We provide 1 year manufacturer warranty from the date of purchase. If you have any questions about this item, please feel free to contact us. We will reply you within 24 hours
Bluetooth 5.3 Call & Message Notification More Comfortable: The smart watch has a built-in high performance microphone and speaker. By connecting to your smartphone via Bluetooth 5.3, you can receive calls, check your history, and store your contact information on the watch. No need to take out your smartphone so you can talk smoothly while driving or working. You can also instantly receive notifications such as LINE, Facebook, Instagram, X (formerly Twitter), so you won't miss important messages. Compatible with both iOS and Android devices, support daily communication more convenient
1.83-inch Large Screen & DIY Dial: The smart watch features a 1.83-inch high-definition display that allows you to see notifications and characters at a glance. Easy to use with smooth touch operation like a smartphone. In addition to over 150 stylish dial designs, you can create your own dial by taking your favorite photos (pets, family, landscapes, etc.) from your smartphone. Customize your screen to fit your mood every day and add color to your day

￥2,799 ￥36,800 92% Off
04

SAIKATI

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On Amazon

Smart Watch, 2025 Improved Performance Mode, Compatible with iPhone, Android, Bluetooth Call Function, 1.83-inch Large Screen, SMS/Line Notifications, Smart Watch, Activity Meter, Thin, Lightweight
9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Long Battery & Supports Over 100 Sports Modes & IP68 Waterproof: Equipped with a large capacity battery that can be used for up to 5 to 7 days on a full charge of about 2.5 hours. The smart watch is equipped with over 100 different exercise modes to fully record various activities such as walking, running, yoga, fitness, basketball and swimming. It accurately monitors your steps, exercise distance and calories burned, making it useful for managing your health and dieting routine. In addition, it is IP68 waterproof rating, so it is safe to use even when washing your hands or face or on rainy days. You can use it without worrying about sweat training. (*Please refrain from using in baths, saunas, or hot springs.)
Keep your health management. Multifunctional Smart Watch for Daily Life: The smart watch monitors your steps, distance traveled, calorie consumption, sleep quality, and stress levels for 24 hours to support your daily health. It also has a reminder and breathing guide to prevent oversitting and menstrual cycle management for women. Not only does it support a healthy lifestyle, it also comes with a variety of functions that are useful in daily life, such as stopwatch, timer, music control, brightness adjustment, and smartphone exploration. Perfect for work or personal use
Compatible Devices: The smart watch is compatible with Android 6.0, iOS 9.0, and Bluetooth 4.0 and above. The Japanese app can be synchronized with the dedicated VeryFit app to check detailed data by day. We provide 1 year manufacturer warranty from the date of purchase. If you have any questions about this item, please feel free to contact us. We will reply you within 24 hours
Bluetooth 5.3 Call & Message Notification More Comfortable: The smart watch has a built-in high performance microphone and speaker. By connecting to your smartphone via Bluetooth 5.3, you can receive calls, check your history, and store your contact information on the watch. No need to take out your smartphone so you can talk smoothly while driving or working. You can also instantly receive notifications such as LINE, Facebook, Instagram, X (formerly Twitter), so you won't miss important messages. Compatible with both iOS and Android devices, support daily communication more convenient
1.83-inch Large Screen & DIY Dial: The smart watch features a 1.83-inch high-definition display that allows you to see notifications and characters at a glance. Easy to use with smooth touch operation like a smartphone. In addition to over 150 stylish dial designs, you can create your own dial by taking your favorite photos (pets, family, landscapes, etc.) from your smartphone. Customize your screen to fit your mood every day and add color to your day

￥4,390
05

XIAOMI

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On Amazon

Xiaomi Smart Band 10 Smart Watch, 1.72 Large Screen Experience, 21 Days of Continuous Use, 1,500 nits Brightness, Visibility, Enhanced Swimming Mode, 9-Axis Motion Sensor, 24-Hour Health Management
9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

【Long-lasting Battery for 21 Days of Continuous Use】With upgraded low-power hardware and intelligent power-saving algorithms, the system power consumption is significantly reduced, achieving an impressive 21 days of long-lasting battery life
【Immersive large screen experience】With a 1.72-inch organic EL (AMOLED) large screen display and a symmetrically ultra-thin bezel of just 2.0mm achieved through vacuum sealing technology, a luxurious new screen has appeared The screen occupancy has been significantly increased from 65.6% to 73%, and the viewing area is +11% larger by previous generation Visibility has been further enhanced Moreover, the display brightness is 25% higher than the previous generation, with a maximum brightness of 1500 nits, allowing you to clearly read messages and notifications even in direct sunlight
【24-Hour Personal Fitness Coach】Equipped with a high-precision 9-axis motion sensor and an evolved professional algorithm, the Xiaomi Smart Band 10 measures exercise and health data more accurately than ever before You can measure your heart rate in real time whether you're cycling or swimming Reliable data supports your wellness habits effectively
[HyperOS 2.0 New Dimension Device Connectivity] Check earphone battery levels, adjust volume, switch noise canceling modes, control slides during presentations, and more - seamless connectivity makes daily operations more convenient Additionally, with the remote camera function, you can easily take photos from a distance In addition, it comes with a variety of fun watch faces that allow you to enjoy puzzle and shooting games, making it perfect for passing the time A fashionable smart item that combines functionality and playfulness
Sleep Monitoring 2.0: Improved sleep and wake detection accuracy than the previous generation, especially enhanced detection stability and reduced error recording during low activity Organize daily, weekly, and monthly sleep data and display it as an easy-to-understand report Based on past sleep data and in collaboration with international expert organizations, we provide personalized sleep improvement suggestions and advice tailored to you Additionally, it supports 24-hour monitoring of blood oxygen saturation and stress, providing comprehensive support for daily health management

￥6,019
06

MTDKA
94% Off

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Smart Watch Music Playback Smart Watch with 1.9 inch Industry HD Large Screen
9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

(2025 Improved Performance Model, Precise Data Usage) The state-of-the-art 2025 advanced performance model "R8" is a multi-functional smart device equipped with innovative technology that carefully records and analyzes your daily data and reaches specific suggestions to help you enhance your lifestyle

￥2,499 ￥39,999 94% Off
07

Audwierr
46% Off

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On Amazon

(Amazon.co.jp Exclusive) Smart Watch, 2026 Evolution Model & 2 Belts Included) 2.01-inch Large Screen, iPhone Compatible, Android Compatible, Bluetooth Call Function, GPS Function, Weather, IP67
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Large 2.01-inch HD Screen & DIY Dial: The Smart Watch has a large 2.01-inch screen that allows you to enjoy a higher resolution viewing experience and a smooth touch to the touch, making it easier to see notifications and text at a glance. In addition to selecting a preset dial from the main unit, you can download more than 100 different dials from the dedicated “DAFIT” app. You can choose a photo on your smartphone to customize the dial. In addition, it has a DIY dial function so you can change it according to your preference. In addition, the bands are interchangeable, so you can swap the standard 22mm width band according to your preference
Japanese App: The Japanese app can be downloaded from Google Play Store and Apple Store, and you can read and download the QR code. Sync with the dedicated "DAFIT" app to check detailed data by day. This smart watch is TELEC-certified, technical standards certified, and has passed safety standards inspection. We provide 1 year warranty from the date of purchase. If you have any questions about this item, please feel free to contact us. We will reply you within 24 hours. Contact Method: "Account Service" > "Order History" > "Sold by" > "Ask a question"
Equipped with state-of-the-art Bluetooth 5.3, Call/Message Notification, Call Function, Line Message Notifications, and Convenient Functions: When connected to your smartphone, you can make or answer calls directly from your smartwatch, save your call history and check your contact information. In addition to pedometer, weather forecast, alarm, data sync, clock function, call function, remote camera, sedentary alert, voice assistant, smartphone finder, SOS function, calculator, flashlight, music control/playback, etc
Compatible Models, IP67 Waterproof, Package Contents & Multilingual Support: IP67 waterproof, so you can use it for everyday washing your hands or face, as well as for sweaty training. Package Contents: Smart watch x 1, dedicated charging cable x 1, Japanese instruction manual x 1. Compatible with smartphones that support Android 6.0/iOS 10.0 or later, Bluetooth 5.0 or later. Includes more than 23 languages including Japanese, Chinese, and English. You can set the language you need with the dedicated DAFIT app
270 mAh Long Lasting Battery & Various Exercise Modes: The built-in 270 mAh battery charges for about 2 hours and can be used continuously for 3 to 7 days. The standby time is 20 days, eliminating the hassle of frequent charging. Equipped with over 110+ sports modes (climbing, running, etc.), you can track your workout time in a variety of sports and fitness. In addition, it can also be used as an activity meter to record your daily steps, increasing your motivation to exercise and helping you prevent lack of exercise

￥2,699 ￥4,999 46% Off
08

HOIBAI
93% Off

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On Amazon

Smart Watch (2025 Industry Masterpiece) Compatible with iPhones, Android Compatible, Latest Bluetooth 5.4 Call Function, Music Playback, Large 1.9 Inch Screen, Activity Meter, Wristwatch, 100 Exercise
8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Music Control/Playback & Message Notifications: In addition to ensuring that your smartwatch is connected to your smartphone, you can control music playback, pause, and stop songs. SMS, Twitter, Facebook, Line, Ins, and Email notifications will notify you on the watch, so you can read messages without taking your smartphone out of your pocket
Latest Bluetooth 5.4 Call Function & Contact Book Sync: Built-in speaker and high performance microphone. When connected to a dedicated app, you can make or answer calls directly from your smartwatch. In addition, you can sync 8 phone notebooks to display the incoming call's name and know who's phone number. This smart watch allows you to take calls without taking out your smartphone, so you can keep your smartphone in your pocket, or even when you are driving or cooking, you will not miss important incoming calls. It provides great convenience for your daily work, life and driving
Compatible Devices: The smart watch is compatible with Android 5.0, iOS 9.0, and Bluetooth 4.0 and above. If you have any problems with the product, please feel free to contact us through your order history
(100 Kinds of Exercise Modes & IP68 Premium Waterproof) You can use it for 100 kinds of sports including outdoor sports, training, dancing, boxing, ball games, snow sports, water sports, and leisure sports. For example: running, biking, ballet, jazz dancing, billiards, table tennis, handball, table tennis, handball, water skiing, kayaking, rafting, fishing, etc. Record exercise data, pedometer, activity meter, distance and so on. It also has IP68 waterproof rating, so you can protect it from daily sweat, rain, and splashes of water, so you don't have to remove it when washing your hands or face. However, it is not recommended to wear it when swimming or bathing
(1.9-inch High Definition Screen & 260+ Dial & DIY Screen) Combines elements such as a large 1.9-inch screen and a high resolution of 240 x 286 pixels, so you can enjoy a higher resolution visual experience and a touch like your smartphone, making it more convenient to operate. In addition, over 260 different dials can be used in the app, and the simple design blends well with both business and daily life, so you can use it for any occasion. You can set the pictures of your lover, idol or family on the watch face as you like

￥2,499 ￥36,800 93% Off
09

XIAOMI

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On Amazon

Xiaomi Smartwatch, Redmi Watch 5 Active, 2-Inch Large Screen Display, 18-Day Battery Life, Bluetooth Calling, 24-Hour Heart Rate Monitoring, Alexa Compatible, Midnight Black
8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

【Reliable with ATM water resistance】Equipped with 5 ATM water resistance suitable for everyday use, it provides peace of mind even in light rain or when washing hands
【Large, easy-to-read 2-inch LCD display】Equipped with a square 2-inch LCD (liquid crystal) display, it displays vividly and large with a screen occupancy rate of over 70% Adopts a matte finish frame with a fine style and smooth texture It comes in 2 colors: Midnight Black and Matte Silver with a minimalist design combining beauty and elegance
【Clear calls even when apart with dual microphones】Bluetooth calling function, dual microphone noise canceling function, and 80 cm* directional ambient sound function allow for clear and flexible calls
【Battery lasts up to 18 days on a single charge】Equipped with a 470mAh battery that lasts up to 18 days in standard use mode, frequent charging is not necessary during outdoor activities or travel
【140+ Workout Modes with Data-Based Training】Supports over 140 workout modes, automatically detects activities such as running, walking, cycling, elliptical, rowing, jump rope, etc By accurately tracking health metrics such as all-day stress and vitality scores, it enables data-driven and effective workouts

￥3,980

9 Best スマートウォッチ in 日本

myFirst Fone S4 キッズスマートウォッチ GPSトラッキング ビデオ通話 (スペースブルー)

myFirst Fone S3 キッズスマートウォッチ GPSトラッキング ビデオ通話 (SIMなし, コットンキャンディー)

Smart Watch, 2025 Improved Performance Mode, Compatible with iPhone, Android, Bluetooth Call Function, 1.83-inch Large Screen, SMS/Line Notifications, Smart Watch, Activity Meter, Thin, Lightweight

Smart Watch, 2025 Improved Performance Mode, Compatible with iPhone, Android, Bluetooth Call Function, 1.83-inch Large Screen, SMS/Line Notifications, Smart Watch, Activity Meter, Thin, Lightweight

Xiaomi Smart Band 10 Smart Watch, 1.72 Large Screen Experience, 21 Days of Continuous Use, 1,500 nits Brightness, Visibility, Enhanced Swimming Mode, 9-Axis Motion Sensor, 24-Hour Health Management

Smart Watch Music Playback Smart Watch with 1.9 inch Industry HD Large Screen

(Amazon.co.jp Exclusive) Smart Watch, 2026 Evolution Model & 2 Belts Included) 2.01-inch Large Screen, iPhone Compatible, Android Compatible, Bluetooth Call Function, GPS Function, Weather, IP67

Smart Watch (2025 Industry Masterpiece) Compatible with iPhones, Android Compatible, Latest Bluetooth 5.4 Call Function, Music Playback, Large 1.9 Inch Screen, Activity Meter, Wristwatch, 100 Exercise

Xiaomi Smartwatch, Redmi Watch 5 Active, 2-Inch Large Screen Display, 18-Day Battery Life, Bluetooth Calling, 24-Hour Heart Rate Monitoring, Alexa Compatible, Midnight Black

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myFirst Fone S4 キッズスマートウォッチ GPSトラッキングビデオ通話 (スペースブルー)

myFirst Fone S3 キッズスマートウォッチ GPSトラッキングビデオ通話 (SIMなし, コットンキャンディー)