ATOK (日本語入力システム) is an app by JustSystems Corporation in the Productivity category. It includes native code only for x86 32-bit and ARM (legacy), so it won't run on 64-bit-only phones such as recent Pixels.
It asks for 6 permissions, 2 of them sensitive: read contacts and modify shared storage.
Certificate issued to “共通技術開発部”Not the developer's name (“JustSystems Corporation”). Names in certificates can't be verified, so this alone proves nothing.
Store checks and file details
Developer signature under reviewMar 7, 2025
Antivirus scan passedNov 12, 2020
Signed byCN=武政秀和, OU=株式会社ジャストシステム, O=共通技術開発部, L=徳島, ST=徳島, C=jp
Uploaded by “nadmom”Silver tier · 32,836 followers · uploading since 2011
Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.
Permissions (6)
ATOK (日本語入力システム) requests 6 permissions, 2 of them sensitive.
Can I install this APK over the version I already have?
Only if it is signed with the same certificate as the copy on your phone and isn't an older version. If Android says “App not installed”, the certificates differ; uninstalling your copy first works but deletes its data unless it is backed up.
Is the ATOK (日本語入力システム) APK safe?
No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. After downloading, check that the file's MD5 is baae28c39f5a026121f2ad187e7ae598.