Sakana AI has added a new feature called Sakana Translate to its chat service, Sakana Chat. It handles bidirectional translation across Japanese, English, and Chinese. The translation engine is Namazu, the company’s model series adapted for Japanese.
Sakana Translate ships as a free web app. A single account unlocks all three of its modes.
What is Sakana Translate
Sakana Translate is a browser-based translation product, not a new base model. It runs on Namazu, Sakana AI’s Japan-adapted model series.
The concept Sakana AI states is ‘deep translation for Japan.’ The goal goes beyond swapping words and sentence structures. It aims to carry context, tone, and register between languages.
That focus targets a specific gap. Sakana AI argues that general tools often miss what makes Japanese distinctive. Examples include business honorifics, culturally specific concepts, abbreviations, and internet slang. Grammar may stay correct while interpersonal tone gets lost.
The product bundles three functions into one screen: Translate, Proofread, and Ask.
The Three Modes, Explained
Each mode targets a different everyday task. The table below summarizes them.
ModeWhat it doesKey detailBest forTranslateConverts pasted text between the three languagesUp to ~5,000 Japanese characters, streaming output, history saved automaticallyEmails, slide decks, articles, web pagesProofreadRefines a draft into a more natural versionChanges shown with diff highlighting; adjusts tone, politeness, and formalityBusiness email and English writing checksAskAnswers follow-up questions about a resultClarifies nuance, suggests alternatives, explains grammar in the same contextLearning why a translation reads the way it does
A few terms are worth unpacking for engineers new to this space.
Streaming output means the translation appears progressively, token by token. You do not wait for the full result before reading. This mirrors how chat models return text.
Diff highlighting shows exactly what changed. Additions and removals are marked inline, like a version-control diff. Proofread goes past grammar. It also tunes naturalness, politeness, and the register a reader expects.
Ask removes the tool-switching problem. You no longer jump between a translator and a dictionary. Nuance questions get answered against the same source and output.
You can try all three modes in the interactive demo below