ガイドGuide· updated
The English Guide to Yahoo! Flea Market (Yahoo! Furima)
Yahoo! Flea Market — Yahoo!フリマ in Japanese, often written Yahoo! Furima, and known until 2023 as PayPay Flea Market (PayPayフリマ) — is the fixed-price flea-market app in the Yahoo! Japan family, sitting alongside Yahoo! Auctions. It's Japan's third-largest secondhand app after Mercari and Rakuma, and it is by far the hardest for overseas buyers to use: the app and website are Japanese-only, and Yahoo! JAPAN services aren't available in the EU, EEA or UK.
That barrier is precisely the opportunity. Inventory there gets a fraction of the international eyes that Mercari gets — the same item routinely sits longer and sells cheaper.
What's actually on it
The same categories that make Mercari famous — fashion, trading cards, figures, cameras, games — with heavy overlap in sellers but not in listings. Many Japanese sellers cross-post; many don't. Fees and campaigns differ between the apps, so plenty of inventory exists only on Furima. For collectors it functions as a second, quieter Mercari.
The overseas problem (and the workarounds)
Everything is in Japanese, and Yahoo! JAPAN isn't available in the EU, EEA or UK. Proxy services solved the buying half: several of the majors integrate Yahoo! Flea Market directly, so once you have a listing URL, purchasing works exactly like a Mercari proxy order.
The finding half is harder. You can browse the Japanese web version with a translator extension, but saved-search notifications live in the Japanese app, which needs a Yahoo! JAPAN ID verified by SMS to a Japanese mobile number. Japan Alerts closes that gap: it monitors every new Yahoo! Flea Market listing alongside Mercari, Rakuma and Yahoo! Auctions, and matches your English search against Japanese titles automatically.
Why this is the arbitrage marketplace
Resale arbitrage is a crowd game — profits go to whoever sees the listing first, and on Mercari Japan the crowd is now global. On Yahoo! Flea Market the crowd is still mostly domestic. Same sellers, same goods, structurally fewer competing buyers: if you're hunting anything with resale value, it belongs in your rotation, and an alert makes the region wall irrelevant.