About
ConnectJapan
ConnectJapan is a free comparison tool that helps travelers find the best eSIM data plans for visiting Japan. We compare 317+ plans from 90+ providers to help you stay connected during your trip.
What We Do
We aggregate eSIM plan data from major providers including Airalo, Ubigi, Saily, Holafly, and many more. Our comparison tool lets you filter by data amount, duration, price, network type (4G/5G), and features like hotspot and voice calls.
Our Testing
We don't just aggregate data — we test it. Our speed tests cover 6 eSIM providers across Tokyo, Osaka, Shinkansen, Hakone, and Hokkaido. We publish real numbers: download/upload speeds, latency, and signal drop frequency at each location. Our reviews include multi-day usage scenarios with actual data consumption tracking.
For Travelers
Whether you need a quick 3-day plan for a Tokyo weekend or unlimited data for a month-long digital nomad stay, we help you find the right plan at the best price. Our guides cover everything from eSIM setup to Japan network coverage.
For Developers & AI Agents
We provide a free REST API at /api/v1/ for programmatic access to plan data. AI agents can query our API to help users find eSIM plans. See our OpenAPI spec for details.
Affiliate Disclosure
This site contains affiliate links. When you purchase an eSIM plan through our links, we may earn a commission at no extra cost to you. This helps us keep the service free and up to date. Our comparisons and recommendations are based on objective criteria (price, data, coverage) and are not influenced by affiliate relationships.
Contact
Operated by Social Decode LLC.
Email: kakefuda@social-decode.com