jp.htmlspecs.com

Scope of the translations

The site covers platform core languages and foundations such as HTML, the HTML Ruby Markup Extensions, ECMAScript 2027, the source map format, WebAssembly JavaScript and Web APIs, DOM, DOM Parsing, URL, URL Pattern, Web IDL, Encoding, MIME Sniffing, Infra, and Compatibility. Each entry links to its upstream source, for example the WHATWG HTML Living Standard or a W3C Candidate Recommendation, and shows the specification status as a badge.

URI and media types

Beyond the core languages, the project translates identifier and media type specifications such as URI Generic Syntax from RFC 3986, internationalized resource identifiers, and media type registration procedures. These pages give Japanese readers direct access to the normative references that underpin web addressing and content negotiation. Every translated page keeps a link to the original English source for cross checking.

Why a Japanese spec mirror helps

Web standards are published in English and change frequently, which makes them hard to follow for readers who prefer Japanese. By mirroring the living standards and tracking their draft, candidate, and recommendation statuses, the site gives a single place to read current specifications in Japanese. The project is written in HTML and maintained as a public reference for Japanese speaking web developers.

Editorial conclusion

jp.htmlspecs.com is maintained as an HTML based reference that links every Japanese page back to upstream sources such as the WHATWG and W3C specifications it translates.