Google Japanese Input is described as 'Japanese input method editor (IME), featuring functionality such as: - Learning capabilities of frequently used words and phrases allowing for automatic predictive suppletions or suggestions (Can be disabled in the secret mode for privacy' and is an app in the OS & Utilities category. There are three alternatives to Google Japanese Input for a variety of platforms, including Windows, Android, Android Tablet, Chrome OS and F-Droid. The best alternative is Google Input Tools, which is free. Other great apps like Google Japanese Input are Mozc (Free, Open Source) and Google Pinyin (Free).
Google Pinyin IME was an input method developed by Google China Labs. The tool was made publicly available on April 4, 2007. Aside from Pinyin input, it also includes stroke count method input. As of March 2019, Google Pinyin has been discontinued and the download page tools.