Japanese input across your devices
Handwrite a word or a whole sentence, confirm the locally recognized text, and send it straight to the focused field in your paired browser.
Recognition runs locally on your writing device.
Browser receivers · Latest release
Choose the browser where you want Japanese text to arrive. The extension connects that browser to the writing pad on your other device.
Chrome · Edge · Brave
Download the ZIP above, then extract it to a folder you will keep.
Open chrome://extensions. Use
edge://extensions or
brave://extensions in those browsers.
Turn on Developer mode, choose Load unpacked, and select the extracted folder.
Open Kaku from the extensions menu and request a pairing code.
Firefox desktop
Download and extract the ZIP, then open
about:debugging#/runtime/this-firefox.
Choose Load Temporary Add-on and select
manifest.json inside the extracted folder.
Open Kaku from the extensions menu and request a pairing code.
For a permanent install, use the signed XPI when it is available on the latest release.
Unsigned temporary add-ons are removed when Firefox restarts.
A simple handoff
Use a stylus, touch, or mouse—or switch to typing whenever you prefer.
Review local recognition candidates, choose a suggestion, or edit the result yourself.
Deliver manually or automatically to the focused field in your paired Chromium or Firefox browser.
Built for your own server
Raw strokes stay on the writing device. Self-host the relay and keep the handoff on infrastructure you control, with no paid cloud dependency.
Ready when you are