2017-03-01現在、コチラのサイトでも利用中のNoto Sans Japaneseです。CDNからの読み込みも比較的早く、ストレス無く利用できておすすめです。
フォントの読み込み
@font-face { font-family: 'Noto Sans Japanese'; font-style: normal; font-weight: 100; src: url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Thin.woff2) format('woff2'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Thin.woff) format('woff'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Thin.otf) format('opentype'); } @font-face { font-family: 'Noto Sans Japanese'; font-style: normal; font-weight: 200; src: url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Light.woff2) format('woff2'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Light.woff) format('woff'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Light.otf) format('opentype'); } @font-face { font-family: 'Noto Sans Japanese'; font-style: normal; font-weight: 300; src: url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-DemiLight.woff2) format('woff2'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-DemiLight.woff) format('woff'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-DemiLight.otf) format('opentype'); } @font-face { font-family: 'Noto Sans Japanese'; font-style: normal; font-weight: 400; src: local('NotoSansJP-Regular.otf'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Regular.woff2) format('woff2'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Regular.woff) format('woff'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Regular.otf) format('opentype'); } @font-face { font-family: 'Noto Sans Japanese'; font-style: normal; font-weight: 500; src: url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Medium.woff2) format('woff2'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Medium.woff) format('woff'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Medium.otf) format('opentype'); } @font-face { font-family: 'Noto Sans Japanese'; font-style: normal; font-weight: 700; src: url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Bold.woff2) format('woff2'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Bold.woff) format('woff'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Bold.otf) format('opentype'); } @font-face { font-family: 'Noto Sans Japanese'; font-style: normal; font-weight: 900; src: url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Black.woff2) format('woff2'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Black.woff) format('woff'), url(//fonts.gstatic.com/ea/notosansjapanese/v6/NotoSansJP-Black.otf) format('opentype'); }
フォントの適用(デフォルトテーマの場合)
html[lang="ja"] body, html[lang="ja"] button, html[lang="ja"] input, html[lang="ja"] select, html[lang="ja"] textarea { font-family: Noto Sans Japanese, "Hiragino Kaku Gothic Pro", Meiryo, sans-serif; }