Sumire Japanese Keyboard

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 customizable keyboard layouts, aiming to make typing a truly personal experience.

✨ Key Features

- 🔒 100% Offline & Secure Works flawlessly in airplane mode. With zero network permissions, your data never leaves your device. Period.

- 🧠 Powerful Conversion Engine Powered by the large-scale dictionary from mozc (the core of Google's Japanese IME) for highly accurate, context-aware predictions.

- 📖 Powerful User Dictionary Get predictive suggestions for your registered words via forward-matching search. Full import/export support gives you complete control over your dictionary.

- 📋 Convenient Snippets Instantly insert frequently used phrases, email addresses, or greetings using an exact-match trigger word. Also supports import/export.

- 🎨 Ultimate Customization Go beyond themes. Adjust key height and sensitivity, and even create your own fully custom keyboard layouts to perfectly match your typing style.

- 📱 Modern by Design Developed in Kotlin from the ground up and optimized with Jetpack libraries for a smooth, fast, and responsive UI. It's also optimized for tablets and foldables.

🔐 Privacy & Security

- Zero Network Permission: The AndroidManifest.xml does not contain the INTERNET permission. - Encrypted Learning Data: Your personal dictionary and learning data are stored locally, encrypted with AES-256.

📄 License

Copyright © 2025 Kazuma Naka

MIT