diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4f7389c31c16..2d96a023258e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 
 ### Client
 - Fix: ページ一覧ページの表示がモバイル環境において崩れているのを修正
+- Fix: MFMでルビの中のテキストがnyaizeされない問題を修正
 
 ### Server
 -
diff --git a/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts b/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
index d4c3ef60aa1f..fe599dceadb7 100644
--- a/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
+++ b/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
@@ -242,11 +242,17 @@ export default function(props: MfmProps) {
 					case 'ruby': {
 						if (token.children.length === 1) {
 							const child = token.children[0];
-							const text = child.type === 'text' ? child.props.text : '';
+							let text = child.type === 'text' ? child.props.text : '';
+							if (!disableNyaize && shouldNyaize) {
+								text = doNyaize(text);
+							}
 							return h('ruby', {}, [text.split(' ')[0], h('rt', text.split(' ')[1])]);
 						} else {
 							const rt = token.children.at(-1)!;
-							const text = rt.type === 'text' ? rt.props.text : '';
+							let text = rt.type === 'text' ? rt.props.text : '';
+							if (!disableNyaize && shouldNyaize) {
+								text = doNyaize(text);
+							}
 							return h('ruby', {}, [...genEl(token.children.slice(0, token.children.length - 1), scale), h('rt', text.trim())]);
 						}
 					}