diff --git a/crates/typst-library/src/math/matrix.rs b/crates/typst-library/src/math/matrix.rs
index b6c4654ed7..69a706233f 100644
--- a/crates/typst-library/src/math/matrix.rs
+++ b/crates/typst-library/src/math/matrix.rs
@@ -216,11 +216,11 @@ pub struct MatElem {
     pub rows: Vec<Vec<Content>>,
 }
 
-/// A case distinction.
+/// 場合分け。
 ///
-/// Content across different branches can be aligned with the `&` symbol.
+/// `&`記号を用いると異なる分岐に属するコンテンツを整列できます。
 ///
-/// # Example
+/// # 例
 /// ```example
 /// $ f(x, y) := cases(
 ///   1 "if" (x dot y)/2 <= 0,
@@ -231,11 +231,10 @@ pub struct MatElem {
 /// ```
 #[elem(Mathy)]
 pub struct CasesElem {
-    /// The delimiter to use.
+    /// 使用する区切り文字。
     ///
-    /// Can be a single character specifying the left delimiter, in which case
-    /// the right delimiter is inferred. Otherwise, can be an array containing a
-    /// left and a right delimiter.
+    /// 単一の文字で左区切り文字を指定する場合、右区切り文字は自動的に推論されます。
+    /// それ以外の場合は、左区切り文字と右区切り文字を含む配列を指定します。
     ///
     /// ```example
     /// #set math.cases(delim: "[")
@@ -244,7 +243,7 @@ pub struct CasesElem {
     #[default(DelimiterPair::BRACE)]
     pub delim: DelimiterPair,
 
-    /// Whether the direction of cases should be reversed.
+    /// 場合分けの向きを反転させるかどうか。
     ///
     /// ```example
     /// #set math.cases(reverse: true)
@@ -253,7 +252,7 @@ pub struct CasesElem {
     #[default(false)]
     pub reverse: bool,
 
-    /// The gap between branches.
+    /// 分岐間の間隔。
     ///
     /// ```example
     /// #set math.cases(gap: 1em)
@@ -263,7 +262,7 @@ pub struct CasesElem {
     #[default(DEFAULT_ROW_GAP.into())]
     pub gap: Rel<Length>,
 
-    /// The branches of the case distinction.
+    /// 場合分けの各分岐を表す子要素。
     #[variadic]
     pub children: Vec<Content>,
 }
diff --git a/website/translation-status.json b/website/translation-status.json
index 81e95d57ce..36838c3eb5 100644
--- a/website/translation-status.json
+++ b/website/translation-status.json
@@ -82,7 +82,7 @@
 	"/docs/reference/math/attach/": "untranslated",
 	"/docs/reference/math/binom/": "untranslated",
 	"/docs/reference/math/cancel/": "untranslated",
-	"/docs/reference/math/cases/": "untranslated",
+	"/docs/reference/math/cases/": "translated",
 	"/docs/reference/math/class/": "untranslated",
 	"/docs/reference/math/equation/": "translated",
 	"/docs/reference/math/frac/": "translated",