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Google Japanese Input vs ATOK: catalog facts
Google Japanese Input	ATOK
Best for: Anyone typing Japanese on a Windows or Mac computer	Best for: People who type a lot of Japanese and want more accurate conversion
Free Free to download and use.	Paid Sold as the ATOK Passport subscription with a free trial.
Windows, macOS	Windows, macOS, Android, iOS
Large vocabulary built from web usage Automatic dictionary updates All 4 strengths for Google Japanese Input Large vocabulary built from web usage Automatic dictionary updates Phrase autocomplete with a secret mode Typed text is not sent to Google	Conversion engine that adapts to your typing habits 63 optional genre dictionaries All 4 strengths for ATOK Conversion engine that adapts to your typing habits 63 optional genre dictionaries One subscription covers desktop and mobile Built-in AI rewrite assistant
No Linux build; Mozc fills that role Site and help are in Japanese	Subscription required after the trial Website and interface are in Japanese
Downloadable app	Downloadable app
Not open source	Not open source
License not stated	License not stated
No account needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Google Japanese Input google.co.jp/ime Catalog checked October 1, 2026	Official website Full listing and sources Sources for ATOK atok.com/mac play.google.com/store/apps/details apps.apple.com/jp/app/atok-professional-%E6%97%A5%E6%9C%AC%… Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.