chromium/third_party/blink/web_tests/external/wpt/html/semantics/text-level-semantics/the-ruby-element/ruby-usage.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML test: ruby - mark phrasing content</title>
<link rel="author" title="Intel" href="http://www.intel.com/">
<link rel="mismatch" href="ruby-usage-notref.html">
<link rel="help" href="https://html.spec.whatwg.org/multipage/text-level-semantics.html#the-ruby-element"/>

<p><ruby>君<rt>くん</ruby><ruby>子<rt>し</ruby>は<ruby>和<rt>わ</ruby>して<ruby>同<rt>どう</ruby>ぜず</p>