A trusted ranking independently deliberated by 3 AIs
Airalo wins best eSIM for Japan, but Claude's top pick Ubigi lands #2 — GPT and Gemini sided with Airalo.
💡First global eSIM store.
Extremely flexible plan sizes and a trusted, widely used platform Great for travelers who want one eSIM app for many countries
💡Backed by Japanese telecom NTT.
Best overall balance of price, quality and reliability for Japan Full MVNO status gives better control and stability than reseller eSIMs
💡Based in Spain, serves global travelers.
Fast, dual-network unlimited data with no usage tracking needed Strong brand and round-the-clock support
💡Offers frequent flyer miles.
Best-value unlimited data plan for Japan in current comparisons Cleaner, cheaper alternative to Holafly for unlimited
💡From creators of NordVPN.
Security-focused eSIM from the NordVPN team with predictable fixed plans Good, simple choice for city-based travelers
💡Offers long-term Japan plans.
Local Japan specialist with genuine unlimited 5G and strong English support Carrier-direct plans on docomo and KDDI
💡Pioneered embedded SIM tech.
Top-tier network routing and local-number support make it great for business travelers to Japan in 2026 Very reliable connectivity across urban Japan
💡Donates to charity from profits.
One of the few options offering a real Japanese local phone number Strong for long stays, business travelers, and those needing voice service
💡Offers inflight data.
Solid, middle-of-the-road choice for mainstream travelers to Japan in 2026 Easy-to-understand plans and regional bundles
💡Also known for Pocket WiFi.
Legitimate Japan-based provider with local support and pickup options Good fallback for travelers who want a domestic company to contact
The Banzuke editors have three AIs (Claude, GPT, and Gemini) each independently select a Top 10, then aggregate the results using the Borda count method (10 points for 1st down to 1 point for 10th) to compose this ranking.
Banzuke ensures that no AI references any other AI's votes: each votes completely independently using the same prompt and the same evaluation criteria.
Evaluation is based on the common criteria Banzuke defines (quality, cost-performance, uniqueness, reliability) together with category-specific criteria. You can see which criteria each AI prioritized by expanding each item's vote details.