Home / Local eSIMs / Japan eSIM

Japan eSIM

Premium Network

KDDI / SoftBank

Coverage #1

Data Options

Daily / Total / Unlimited

Flexible Choice

Max Speed

5G / 4G LTE

High Speed

Technical Specifications

Network Selection

For Daily Plans

SoftBank 5G

Native IP

Ultra-Low Latency. Best for Local Apps & Gaming.

Total / Unlimited

KDDI 5G + SoftBank 5G

Dual Coverage

Widest Signal. Auto-switch. Best for Skiing & Rural Areas.
Plan Type

Data Only

Use WhatsApp/VoIP for calls. No phone number provided.
Activation

Automatic

Auto-start on arrival; turn on data roaming for ByteSIM.
Support

24/7 Live Support

Instant help via WhatsApp & Email.
ID Verify Not Required
Hotspot

Supported

Share data with laptop/iPad.
Speed Policy

For Unlimited (*5G) Plans:

Guarantees 1080p HD streaming speeds, even under Fair Usage Policy.

For Daily & Total Plans:

High-speed 5G data per quota, then Unlimited 128kbps.
Coverage

Nationwide & Shinkansen

Covers Tokyo, Osaka, Kyoto, Okinawa, Hokkaido & Mt. Fuji.
Seamless signal on Bullet Trains & rural areas.

Japan's Best 5G for Ski Adventures

Powered by Japan's Top 2 Award-Winning Networks.

SoftBank #1 5G Availability: Winner of the "5G Availability" Award. Keeps you on 5G signal longer.

KDDI au #1 Reliability: Unbeatable Stability. Lag-free experience for video calls & gaming.

Source: Opensignal®, Oct 2025 Japan

$2.90 USD

Data

500MB/Day

1GB/Day

2GB/Day

3GB/Day

5GB/Day

10GB/Day

Total 3GB

Total 5GB

Total 10GB

Total 20GB

Total 30GB

Total 50GB

Unlimited Data (*5G Network)

Service Days

1

3

5

7

10

15

20

30

Quantity

Money Back Guarantee? You Bet!

Plans changed? No biggie! With ByteSIM, you're covered. Buy now and enjoy our 6-month money-back guarantee. Changed your mind? No fuss, no muss!

Learn More

Why Choose ByteSIM for Japan?

24/7 Human Support

Need help? Our friendly team is here 24/7 via WhatsApp and email — no bots, just real people ready to assist, especially while traveling.

Immediate delivery

Your Japan eSIM arrives in seconds via email. No shipping, no waiting — works on iPhones, Androids, and all eSIM-compatible devices.

Unlimited 5G Data

Enjoy truly unlimited high-speed data with ByteSIM. Stream, video call, hotspot, and navigate with ease — anywhere in Japan.

Buy Now, Activate on Arrival

Purchase your ByteSIM eSIM in advance and activate it only when you arrive in Japan. No passport, no forms — start using mobile data the moment you land.

Dual-Network Japan

ByteSIM connects you to both KDDI (au) and SoftBank — Japan’s top carriers — for seamless 4G/5G coverage across Tokyo, Kyoto, Osaka, and beyond.

Explore Japan Seamlessly

Stay connected across Japan with ByteSIM’s eSIM. Works perfectly in big cities and tourist spots alike — no SIM card swap required.

24/7 Human Support

Need help? Our friendly team is here 24/7 via WhatsApp and email — no bots, just real people ready to assist, especially while traveling.

Immediate delivery

Your Japan eSIM arrives in seconds via email. No shipping, no waiting — works on iPhones, Androids, and all eSIM-compatible devices.

Unlimited 5G Data

Enjoy truly unlimited high-speed data with ByteSIM. Stream, video call, hotspot, and navigate with ease — anywhere in Japan.

Buy Now, Activate on Arrival

Purchase your ByteSIM eSIM in advance and activate it only when you arrive in Japan. No passport, no forms — start using mobile data the moment you land.

Dual-Network Japan

ByteSIM connects you to both KDDI (au) and SoftBank — Japan’s top carriers — for seamless 4G/5G coverage across Tokyo, Kyoto, Osaka, and beyond.

Explore Japan Seamlessly

Stay connected across Japan with ByteSIM’s eSIM. Works perfectly in big cities and tourist spots alike — no SIM card swap required.

About eSIM for Japan

ByteSIM’s Japan eSIM is designed for travelers who need fast, secure, and flexible mobile data in Japan. It supports major carriers like KDDI (au) and SoftBank — offering reliable 4G and 5G connectivity across cities such as Tokyo, Osaka, Kyoto, and Sapporo. This travel eSIM allows easy switching between networks to ensure the best signal strength wherever you go. No physical SIM card or ID verification is required.

How to Set Up Your ByteSIM Japan eSIM in 3 Minutes

Check & Choose

Verify your phone is eSIM-compatible and unlocked. Pick the plan that fits your trip and check out.

Check Device Compatibility

Install Before You Fly

We email your eSIM instantly. On stable Wi-Fi, scan the QR or use the ByteSIM App for one-tap install.

Arrive & Activate

On arrival, enable the ByteSIM line in Settings and turn Data Roaming: ON. It auto-connects and activates.

Manage & Add More

Track data & days in the App. Need more? Add another plan (start now or later) and switch lines in one tap.

Check & Choose

Verify your phone is eSIM-compatible and unlocked. Pick the plan that fits your trip and check out.

Check Device Compatibility

Install Before You Fly

We email your eSIM instantly. On stable Wi-Fi, scan the QR or use the ByteSIM App for one-tap install.

Arrive & Activate

On arrival, enable the ByteSIM line in Settings and turn Data Roaming: ON. It auto-connects and activates.

Manage & Add More

Track data & days in the App. Need more? Add another plan (start now or later) and switch lines in one tap.

Amazing service, trusted by travelers

Why Millions Choose ByteSIM

Competitive Price

ByteSIM offers unbeatable value on global eSIM plans. With millions of customers a year, we provide affordable travel data for every kind of traveler.

Reliable Global Coverage

As a licensed telecom operator, ByteSIM partners with 200+ top-tier carriers to deliver strong, high-speed 4G/5G coverage in popular travel destinations worldwide.

Flexible Plan Options

Choose from 500MB/day to unlimited plans, with durations from 1 to 30 days. ByteSIM offers 90+ data plans — pick the one that fits your trip best.

Competitive Price

ByteSIM offers unbeatable value on global eSIM plans. With millions of customers a year, we provide affordable travel data for every kind of traveler.

Reliable Global Coverage

As a licensed telecom operator, ByteSIM partners with 200+ top-tier carriers to deliver strong, high-speed 4G/5G coverage in popular travel destinations worldwide.

Flexible Plan Options

Choose from 500MB/day to unlimited plans, with durations from 1 to 30 days. ByteSIM offers 90+ data plans — pick the one that fits your trip best.

Compatible Devices for Japan Travel eSIM

You can check the list of eSIM-compatible devices for travel to Japan

Apple

• iPhone XR • iPhone XS • iPhone XS Max • iPhone 11 • iPhone 11 Pro • iPhone 11 Pro Max • iPhone SE (2020) • iPhone 12 Mini • iPhone 12 • iPhone 12 Pro • iPhone 12 Pro Max • iPhone 13 mini • iPhone 13 • iPhone 13 Pro • iPhone 13 Pro Max • iPhone SE (2022) • iPhone 14 • iPhone 14 Plus • iPhone 14 Pro • iPhone 14 Pro Max • iPhone 15 • iPhone 15 Plus • iPhone 15 Pro • iPhone 15 Pro Max

Note: iPhone 10 does not support eSIM. The first Apple phones to do so were the iPhone XR and the iPhone XS in 2018. Previous models are not supported. Full Apple Compatibility List: Check Now.

Android

• Galaxy Z Fold 2 5G • Galaxy Z Flip • Galaxy Z Flip 5G • Galaxy Z Flip3 5G • Galaxy Z Flip4 • Galaxy Z Flip5 5G • Galaxy Fold • Galaxy Fold 3 • Galaxy Z Fold2 5G • Galaxy Z Fold3 5G • Galaxy Z Fold4 • Galaxy Z Fold5 5G • Galaxy S20 • Galaxy S20+ 5G • Galaxy S21 • Galaxy S21+ 5G • Galaxy S21 Ultra 5G • Galaxy S22 • Galaxy S22+ • Galaxy S22 Ultra • Galaxy Note 20 Ultra 5G • Galaxy Note 20, Galaxy S23 • Galaxy S23+ • Galaxy S23 Ultra • Pixel 3 • Pixel 3a • Pixel 3a XL • Pixel 4 • Pixel 4a • Pixel 4a XL • Pixel 5 • Pixel 6 • Pixel 6a • Pixel 6 Pro • Pixel 7 • Pixel 7 Pro • Pixel 8 • Pixel 8 Pro • Pixel Fold

Note: Full Android Compatibility List: Check Now.

FAQs about eSIM for Travel to Japan

How do I get and activate my Japan eSIM?

You can buy your Japan eSIM online from ByteSIM in just a few clicks — or directly through our iOS and Android apps. After purchase, your eSIM QR code will be instantly delivered to your email and available in the app.

📲 For iOS 17 and later, you can install your eSIM with just one tap inside the ByteSIM iOS App — no QR code needed.
📱 On Android, simply follow the on-screen instructions to add the eSIM manually or via QR scan.

🚀 Activation starts only when you arrive in Japan and turn on data roaming — no early billing, no physical SIM card, and no ID needed.

✅ Works on eSIM-compatible devices including iPhones, Android phones, and tablets.

Which networks does ByteSIM use in Japan?

ByteSIM’s Japan eSIM connects to SoftBank and KDDI (au) — two of the country’s top mobile networks.

📶 According to Opensignal April 2025, KDDI leads in overall 5G experience, while SoftBank offers the widest 5G availability across Japan.

💡 Your eSIM automatically switches between networks for the strongest 4G/5G signal wherever you go — ideal for travelers moving across cities like Tokyo, Osaka, Kyoto, and beyond.

Can I share hotspot or tethering with this eSIM?

Yes, you can. ByteSIM eSIM fully supports hotspot and tethering, with no speed limits — even on unlimited plans.

🔥 Share internet via 2.4GHz (for wider compatibility) or 5GHz (for faster speeds), depending on your device — ideal for laptops, tablets, and travel companions.

Does ByteSIM Japan eSIM include a phone number or support voice calls?

No, ByteSIM Japan eSIM does not support phone numbers, voice calls, or SMS, due to local telecom regulations.

When should I install my eSIM for Japan travel?

The timing for installing an eSIM for Japan can depend on your specific travel plans and preferences. It's a good practice to install your eSIM on the day of your travel to Japan, especially if you want to ensure seamless connectivity as soon as you arrive.

How are Service Days precisely calculated?

ByteSIM Japan eSIM plans follow two service timing models, depending on the plan type and carrier:

Daily SoftBank Plans
For plans that reset daily (e.g. 500MB/day), the data resets each day at 23:00 Japan Time (UTC+9), regardless of the activation time.
Total Data & Unlimited Plans (KDDI + SoftBank dual-network)
These plans follow a 24-hour cycle starting from the moment of activation. For example, if activated at 10:00 AM local time, it will expire at 10:00 AM the next day.

How much data do I need in Japan?

The amount of data you need in Japan depends on your usage patterns and the specific activities you plan to engage in while traveling. For detailed insights, you can check how much data do you need for your holidays abroad to estimate your data requirements. For short trips (a week or less), you may get by with a smaller data plan. Longer stays (several weeks or months) will likely require larger data plans to cover your data needs. Check the available eSIM data plans for Japan offered by carriers and choose one that matches your data needs.

Can I top up or extend my eSIM plan in Japan?

Currently, top-up and extension are not supported due to the anonymous nature of our eSIM products.

💡 But the good news: you can simply buy a new plan at any time — often with a better deal thanks to our reward points and member discounts. The experience is just as seamless, and often even cheaper.

GETTING HELP

More information visit Easy-Installation-Guide
ByteSIM call center: WhatsApp : +852 9243 7776.

Let's talk