ASO agency Japan: a market where translation is sold as optimisation and the storefront plays by its own rules.

Japan is the market every serious app wants and most get wrong. Users spend more per head than anywhere else, iOS dominates, and the App Store has developed conventions of its own: dense, information-rich screenshots with a lot of text; a preference for reassurance and detail over the minimalist Western hero shot; search behaviour that mixes kanji, kana and romaji in ways a keyword tool built for English will not predict. It is a market that rewards genuine local expertise. It has almost nobody selling App Store Optimisation as a discipline.

What ranks for ‘ASO agency Japan’ instead is localisation. Translation agencies, some very good, offer ‘App Store localisation’ and describe it as ASO. A Tokyo-and-London shop offers to get you organic downloads in Japan. Larger mobile marketing companies like V.O.X do development, marketing and SaaS and mention the stores somewhere in the middle. The pattern is clear: Japan’s ASO market is a localisation market with the word optimisation added, and translation is not optimisation.

Here is the difference. Translating your English title and screenshots into excellent Japanese gives you a listing that reads well and says the wrong things. The Japanese storefront needs a different first-screenshot claim, because Japanese users are reassured by different things. It needs a keyword field built from how Japanese people actually search, which is not a translation of the English keyword list. It needs a category read: who your Japanese competitors are, which of them are domestic giants with brand demand, and where a foreign app can realistically appear. A localisation firm produces beautiful Japanese. It does not make those decisions, and a decision made in English and translated is still the wrong decision.

The second pattern is the foreign agency’s Japan slide. Global and regional agencies list Japan as a market they serve, and they serve it through a translation partner and a keyword tool. The strategy is the same as everywhere; the copy is translated; the case studies are from the West. For a market this different, that is expensive guessing.

The third pattern is silence. Japanese app companies do their ASO in-house, quietly, and rarely sell the expertise. The people who genuinely understand the Japanese storefront mostly work at Japanese apps, and the few consultants who have left to work independently are booked and do not advertise. That is why the search results are so thin, and why the thin results are so often the wrong kind of vendor.

Against that: one consultant who treats Japan as a category read rather than a translation job. A teardown of your listing against your actual Japanese competitors. A first-screenshot hypothesis built for how Japanese users decide, not translated from how Americans do. A keyword architecture built from Japanese search behaviour with native input. One test. A handover with dates, and a native copywriter for the words, brought in after the decisions are made. The fee is fixed.

To be fair to the Japanese market: if your listing’s message is already decided and tested and what you need is excellent Japanese, a good localisation firm is exactly the right purchase and there are several. If what you need is to know what your Japanese listing should say, translation will not tell you. Send me the listing and I will show you what a Japanese teardown actually looks like.