Hi Product Hunt — I'm Takahiro, the maker of ASO Japan. I built ASO Japan because researching Japan's App Store is surprisingly difficult, especially for independent developers and teams entering Japan from overseas. A direct translation of an English keyword is rarely enough: the apps that rank, the language users search with, and the level of competition can all be different. ASO Japan brings that research into one iPhone app. You can analyze Japanese keywords, compare demand and competition, browse related apps in ranking order, register your own app, and discover terms worth testing next. The app uses Apple's publicly available data, requires no account or subscription, and keeps saved research on the device. I'd especially love feedback from developers considering Japan as their next market: what information would make that decision easier for you?

ASO Japan

Decode Japan's App Store keywords and competitors

Decode Japan's App Store keywords and competitors