ATOK

It provides a Japanese input method editor that converts keystrokes into Japanese characters, supporting both kana and kanji conversion. The software integrates with the operating system’s text entry pipeline, allowing users to type Japanese in any application while handling composition, candidate selection, and dictionary lookup.

The tool is aimed at Japanese speakers and learners who need to input Japanese text on macOS computers, offering a native experience that works across the platform’s standard text fields and editors. It is maintained by JustSystems, the long‑standing developer of Japanese language software.

The implementation is built specifically for macOS, delivering a stable and mature solution that conforms to the system’s input method framework, ensuring consistent behavior and performance for everyday productivity tasks.