macOS often has multiple versions of Hiragino. If you installed a custom version, it might conflict with the system version. Use Font Book’s "Resolve Duplicates" feature.
@font-face font-family: 'Hiragino Sans'; font-weight: 900; src: local('Hiragino Sans W9'), local('HiraginoSans-W9');
: It offers exceptional support for Japanese Kanji, Hiragana, and Katakana, paired with high-quality Latin characters.
Since Windows does not come with Hiragino, you must have the font file ready.