Mojikumi

Terms

Terms of Use

These terms set out the conditions that apply to the Mojikumi packages and to this site. The software is published under the MIT License, and within its terms you are free to use it for any purpose, commercial or otherwise.

Last updated: 30 July 2026

01

License

The Mojikumi packages and the source of this site are published under the MIT License (Copyright (c) 2026 akira). Commercial use, modification and redistribution are all permitted. The full text is in the LICENSE file of the repository.

The prose and diagrams on this site may be quoted or reproduced as long as the source is credited.

02

Disclaimer

As stated in the MIT License, the software is provided "as is", without warranty of any kind, including merchantability, fitness for a particular purpose and non-infringement. The author is not liable for any damages arising from its use.

Before relying on it somewhere that matters, please confirm how it renders in the environment you actually ship to.

03

Conditions that affect the result

With identical settings, the typesetting still shifts with what a browser implements and with the punctuation metrics a font carries, such as halt and chws. Mojikumi tightens only where the combination has been confirmed, and leaves fonts it cannot judge alone.

Which combinations count as confirmed is recorded in COMPATIBILITY.md and FONT-MATRIX.md in the repository. Figures on the Benchmarks page are limited to those whose procedure can be published. Both may be updated without notice.

04

About the Playground

The Playground is a tool for inspecting typesetting differences. What you type stays inside your browser, but you remain responsible for what you enter, so please do not use confidential material.

05

Third-party software and typefaces

  • Shippori Mincho, Zen Maru Gothic, Noto Sans JP — SIL Open Font License 1.1
  • Yaku Han JP v4.1.1 (YakuHanJP / YakuHanMP) © Qrac — OFL-1.1 AND MIT
  • Next.js, React — MIT License

Yaku Han JP is used in the Playground as the point of comparison for the font-substitution approach. Its full license text is served at /fonts/YakuHanJP-LICENSE.txt.

06

Contact

Bug reports, questions about these terms and examples of typesetting that looks wrong are all welcome in the Issues page of the GitHub repository. A reproducible sentence and your browser details are a great help.