diff --git a/crates/typst-library/src/math/style.rs b/crates/typst-library/src/math/style.rs
index 1f84076ca3..925ce8cec2 100644
--- a/crates/typst-library/src/math/style.rs
+++ b/crates/typst-library/src/math/style.rs
@@ -1,38 +1,38 @@
 use crate::foundations::{func, Cast, Content, Smart};
 use crate::math::EquationElem;
 
-/// Bold font style in math.
+/// 数式中の太字フォントスタイル。
 ///
 /// ```example
 /// $ bold(A) := B^+ $
 /// ```
 #[func(keywords = ["mathbf"])]
 pub fn bold(
-    /// The content to style.
+    /// スタイルを適用するコンテンツ。
     body: Content,
 ) -> Content {
     body.styled(EquationElem::set_bold(true))
 }
 
-/// Upright (non-italic) font style in math.
+/// 数式中の立体（非斜体）フォントスタイル。
 ///
 /// ```example
 /// $ upright(A) != A $
 /// ```
 #[func(keywords = ["mathup"])]
 pub fn upright(
-    /// The content to style.
+    /// スタイルを適用するコンテンツ。
     body: Content,
 ) -> Content {
     body.styled(EquationElem::set_italic(Smart::Custom(false)))
 }
 
-/// Italic font style in math.
+/// 数式中の斜体フォントスタイル。
 ///
-/// For roman letters and greek lowercase letters, this is already the default.
+/// これがローマ字とギリシャ文字の小文字のデフォルトです。
 #[func(keywords = ["mathit"])]
 pub fn italic(
-    /// The content to style.
+    /// スタイルを適用するコンテンツ。
     body: Content,
 ) -> Content {
     body.styled(EquationElem::set_italic(Smart::Custom(true)))
diff --git a/docs/reference/groups.yml b/docs/reference/groups.yml
index 1886e2748f..2554ef4cc5 100644
--- a/docs/reference/groups.yml
+++ b/docs/reference/groups.yml
@@ -18,10 +18,9 @@
   path: ["math"]
   filter: ["upright", "italic", "bold"]
   details: |
-    Alternate letterforms within formulas.
+    数式中の別字体。
 
-    These functions are distinct from the [`text`] function because math fonts
-    contain multiple variants of each letter.
+    数式フォントは各文字に対して複数の異体字を持つため、これらの関数は[`text`]関数とは異なります。
 
 - name: sizes
   title: Sizes
diff --git a/website/translation-status.json b/website/translation-status.json
index 63cd9215d7..89354d8bb2 100644
--- a/website/translation-status.json
+++ b/website/translation-status.json
@@ -92,7 +92,7 @@
 	"/docs/reference/math/roots/": "translated",
 	"/docs/reference/math/sizes/": "translated",
 	"/docs/reference/math/stretch/": "translated",
-	"/docs/reference/math/styles/": "untranslated",
+	"/docs/reference/math/styles/": "translated",
 	"/docs/reference/math/op/": "translated",
 	"/docs/reference/math/underover/": "untranslated",
 	"/docs/reference/math/variants/": "untranslated",