Sumire is a Japanese keyboard built on a single, uncompromising philosophy: absolute privacy. Your thoughts and conversations should never be an asset for third parties. We achieve 100% offline functionality by ensuring every process, from keystroke to candidate conversion, happens entirely on your device.

Built on the open-source mozc engine, Sumire enhances the writing experience with advanced personalization features like a powerful user dictionary, convenient snippets, and fully customizabl