About Furima Navi
Our Mission
Furima Navi is a Japanese website providing free tools for sellers on popular flea market platforms like Mercari, Yahoo Auctions, and Rakuma. We help sellers calculate profits, compare fees, find the cheapest shipping options, and optimize their listings.
This English version is designed to help non-Japanese speakers access the same powerful tools available on our main Japanese site.
Why English Version?
While our main site is in Japanese, we recognize that many people in Japan — including expats, international students, and visitors — use Japanese flea market apps but may find the language barrier challenging when calculating fees or understanding shipping options.
This English version provides the same essential tools to help everyone succeed on Japanese platforms.
Who Uses Our Tools
- •Casual sellers — Decluttering homes and selling unused items
- •Side business sellers — Managing multiple listings efficiently
- •Beginners — Learning how fees, shipping, and taxes work
- •Non-Japanese speakers — Accessing tools in English
Our Commitment
100% Free
Every tool, every time — no freemium gates, no upgrade prompts. We're supported by ads, not by limiting your access.
No Registration
Open a tool, use it, close it. No email, no password, no onboarding.
Privacy First
Profit calculations, price lookups, and shipping estimates all run in JavaScript inside your browser tab. Nothing reaches our server.
Always Updated
Fee rates and shipping tables updated within 48 hours of any platform change.
Contact Us
Have questions, feedback, or suggestions? We would love to hear from you.
Ready to Start?
Check out our free tools for Mercari, Yahoo Auctions, and Rakuma.