Best Japan eSIM — Compared (reviewed Jul 29, 2026)
Local SIMs in Japan are hard to buy as a short-term visitor, and pocket Wi-Fi rentals are pricey and must be returned. A travel eSIM needs no deposit and no return, with coverage from Tokyo to Hokkaido — the mainstream choice for visitors.
🧭 Open the interactive comparison tool (all 110 plans)Top 10 by overall value
| # | Provider | Plan | Price | Per GB | Network | Score | |
|---|---|---|---|---|---|---|---|
| 1 | BNESIM | 50GB / 30 days | $22.96 | $0.46 | NTT Docomo / SoftBank | 89 | View → |
| 2 | BNESIM | 100GB / 30 days | $45.93 | $0.46 | NTT Docomo / SoftBank | 89 | View → |
| 3 | BNESIM | 50GB / 36500 days | $28.70 | - | NTT Docomo / SoftBank | 88.2 | View → |
| 4 | BNESIM | 100GB / 36500 days | $57.41 | - | NTT Docomo / SoftBank | 88.2 | View → |
| 5 | BNESIM | 20GB / 30 days | $11.47 | $0.57 | NTT Docomo / SoftBank | 88.2 | View → |
| 6 | RedteaGO | 50GB / 180 days | $29.90 Code RTGF96F2ERedeem in the RedteaGO app/account first |
$0.60 | RedteaGO local carrier network(auto-switch) | 88 | View → |
| 7 | MobiMatter | 50GB / 30 days | $29.99 | $0.60 | 88 | View → | |
| 8 | RedteaGO | 30GB / 90 days | $19.50 Code RTGF96F2ERedeem in the RedteaGO app/account first |
$0.65 | RedteaGO local carrier network(auto-switch) | 87.7 | View → |
| 9 | RedteaGO | 20GB / 90 days | $13.50 Code RTGF96F2ERedeem in the RedteaGO app/account first |
$0.68 | RedteaGO local carrier network(auto-switch) | 87.5 | View → |
| 10 | BNESIM | 20GB / 36500 days | $13.77 | - | NTT Docomo / SoftBank | 87.4 | View → |
Score = price 60% + network 20% + hotspot 10% + app 10%, normalized within this destination; live prices on provider sites prevail.
Local carrier coverage
| Carrier | Coverage | Notes |
|---|---|---|
| NTT Docomo | Widest coverage, best in mountains | Backbone for most travel eSIMs |
| KDDI (au) | Excellent urban 5G | Some providers can switch |
| SoftBank | Fast in metro areas | Weaker than Docomo outside cities |
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FAQ
Does a Japan eSIM require passport registration?
Data-only travel eSIMs don't; only local SIMs with a phone number require residency status or passport registration.
Is the network stable on the Shinkansen?
Coverage along the Tokaido/Tohoku lines is good; brief dropouts in tunnels — avoid video calls through mountain sections.
Is there signal in the subway?
Tokyo and Osaka subways have full 4G/5G on platforms and in cars.
Other destinations
Data are compiled from official provider plan pages and publicly available sources. We make reasonable efforts to keep pricing and coverage current, but rates, terms and availability may change without notice — always confirm at the provider’s checkout before purchasing. This is an independent comparison site; some links are affiliate links (we may earn a commission at no extra cost to you). Last reviewed Jul 29, 2026.
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