# ESIMJAPAN.com
> ESIMJAPAN.com is a Japan-specialized eSIM store offering 5G unlimited and fixed-rate data plans for travelers. Trusted by travelers from 50+ countries, with real-time network performance data via Connectivity Lab.
For complete documentation, see [Full Documentation](https://esimjapan.com/llms-full.txt)

## Japan Data eSIM Plans
- [5G Unlimited Max Data](https://esimjapan.com/product/5g-unlimited-esim-japan-data-plans/): Truly unlimited 5G/4G LTE eSIM on KDDI network, Japan's top-rated carrier by OpenSignal. Up to 600Mbps download, 42ms ping, 99% nationwide coverage. Available in 3-31 day plans from $11.99. Includes mobile hotspot (2GB for 3 days up to 30GB for 31 days) and free au WiFi Zone access. No data roaming toggle required. No app restrictions. Rated 4.71/5 from 1,000+ reviews.
- [Unlimited Data](https://esimjapan.com/product/cheap-unlimited-esim-japan-data-plans/): Budget-friendly 4G LTE unlimited eSIM on KDDI network, starting from $4.99. Two tiers: Basic (1GB/day at full speed, then 384kbps) and Pro (2GB/day at full speed, then 384kbps). Available in 3-30 day plans. Data only, no calls or SMS. Rated 4.55/5 from 2,500+ reviews.
- [Fixed Data](https://esimjapan.com/product/fixed-data-esim-japan-plans/): 4G LTE fixed GB allowance eSIM on KDDI network. Seven options from 3GB/7days to 50GB/30days, starting from $6.99. Data stops when the allowance is used up - no throttling. Top-up available on most plans. Rated 4.56/5 from 1,300+ reviews.
- [Daily Data](https://esimjapan.com/product/daily-esim-japan-data-plans/): 3GB/day 4G LTE eSIM on Softbank network, renewing every midnight (JST). After 3GB, continues at 128kbps. Available in 5-90 day plans from $17.99. Compatible with iPhone and Samsung Galaxy only. No app restrictions. Rated 4.60/5 from 179 reviews.

## Japan City Data eSIM Plans
- [eSIM Tokyo](https://esimjapan.com/product/esim-tokyo/): Unlimited 4G/5G data eSIM optimized for Tokyo's local network. No speed cap, no app restrictions, no top-up required. Works nationwide across Japan. Rated 4.9/5 from 145+ reviews.
- [eSIM Osaka](https://esimjapan.com/product/esim-osaka/): Unlimited 4G/5G data eSIM optimized for Osaka's local network. No speed cap, no app restrictions. Includes au WiFi Zone access. Works nationwide across Japan.
- [eSIM Kyoto](https://esimjapan.com/product/esim-kyoto/): 4G LTE eSIM on KDDI network, optimized for Kyoto. Two tiers: Basic (1GB/day at full speed, then 384kbps) and Pro (2GB/day at full speed, then 384kbps). Available in 3-12 day plans from $4.99. Top-up available. Covers Gion, Fushimi Inari, Arashiyama, Kiyomizu-dera, and extends to Osaka, Nara, and Kobe. Works nationwide across Japan.
- [eSIM Okinawa](https://esimjapan.com/product/esim-okinawa/): Unlimited 4G/5G data eSIM optimized for Okinawa's local network. No speed cap, no app restrictions. Strong coverage including remote islands such as Tokashikijima. Works nationwide across Japan.

## Multi Country Data eSIM Plans
- [Japan & Korea Fixed Data](https://esimjapan.com/product/japan-korea-esim-data-plans/): Fixed data eSIM covering both Japan and South Korea.
- [Japan & China Fixed Data](https://esimjapan.com/product/japan-china-esim-data-plans/): Fixed data eSIM covering both Japan and China.
- [Japan, Korea & Taiwan Unlimited Data](https://esimjapan.com/product/japan-korea-taiwan-esim-data-plans/): Unlimited data eSIM covering Japan, South Korea, and Taiwan.
- [Japan, Korea & China Unlimited Data](https://esimjapan.com/product/japan-korea-china-esim-data-plans/): Unlimited data eSIM covering Japan, South Korea, and China.
- [East Asia Unlimited Data](https://esimjapan.com/product/esim-east-asia-unlimited/): Unlimited data eSIM covering Japan, Korea, Taiwan, Hong Kong, and Macau.
- [Asia Fixed Data & Calls](https://esimjapan.com/product/esim-asia-fixed-data-calls/): Fixed data eSIM with voice calls, covering 20+ countries across Asia.

## Guide
- [Japan eSIM Starter Guide](https://esimjapan.com/japan-esim-guide/): Hub page covering everything travelers need to know about staying connected in Japan - what eSIM is, how it compares to Pocket WiFi and roaming, and links to in-depth guides on plans, costs, and setup.
- [Best eSIM for Japan 2026](https://esimjapan.com/best-esim-japan/): Side-by-side comparison of top eSIM plans for Japan travel in 2026.
- [eSIM vs Pocket WiFi in Japan: Which Is Better for Travel?](https://esimjapan.com/esim-vs-pocket-wifi-japan/): Practical comparison of eSIM and Pocket WiFi to help travelers choose the right option.
- [Internet in Japan: eSIM, Pocket WiFi & SIM Card Guide (2026)](https://esimjapan.com/internet-in-japan/): Comprehensive guide to all internet options available to travelers in Japan.
- [Japan eSIM Unlimited: What "Unlimited Data" Really Means](https://esimjapan.com/japan-esim-unlimited/): Explains throttling, fair-use policies, and what to expect from unlimited eSIM plans in Japan.
- [How Much Data Do You Need in Japan?](https://esimjapan.com/how-much-data-japan/): Helps travelers estimate data needs based on usage habits and trip length.

## Connectivity Lab
- [Connectivity Lab](https://esimjapan.com/connectivity-lab/): Independent eSIM network research initiative by HARRIE Inc., publishing real-time and historical field-test data on download speed, upload speed, and latency across Japan. Covers daily live measurements, weekly logs, and monthly reports based on on-site testing at airports, urban centers, and transit hubs.
- [Daily eSIM Japan Speed](https://esimjapan.com/connectivity-lab/japan-esim-speed-daily-report/): Daily live speed report measuring download speed, upload speed, and ping latency of eSIM networks in Japan. Tested with au KDDI 5G Unlimited eSIM under real-world conditions.
- [Tokyo Sakura Connectivity Report](https://esimjapan.com/connectivity-lab/japan-sakura-connectivity-report-2026/): Field-test report measuring eSIM signal strength and network performance at major cherry blossom hotspots in Tokyo during peak season crowds.

## Support
- [eSIM Compatible Phones](https://esimjapan.com/esim-compatible-phone/): Compatible and incompatible device list for eSIM activation, covering iPhone, Samsung Galaxy, Google Pixel, Xiaomi, Motorola, and OnePlus. Includes carrier lock check instructions for each device type.
- [eSIM Activation Guide](https://esimjapan.com/how-to-activate-esim/): 3-step eSIM setup guide covering QR code scanning and profile installation, with separate visual walkthroughs for iOS and Android users.
- [How to activate eSIM on iPhone](https://esimjapan.com/how-to-activate-esim-on-iphone/): Step-by-step iPhone eSIM installation guide covering QR code scan, manual entry, data roaming setup, and troubleshooting. Includes instructions for iOS 17.4+ quick install and APN manual configuration.
- [How to activate eSIM on Android](https://esimjapan.com/how-to-activate-esim-on-android/): Step-by-step Android eSIM installation guide covering QR code scan, manual entry, data roaming setup, and troubleshooting. Includes manual network selection and APN configuration for Samsung and other Android devices.
- [ESIMJAPAN.com FAQ](https://esimjapan.com/japan-esim-faq/): Answers to common questions about eSIM activation, compatibility, troubleshooting, and support.