diff --git a/Rules/Languages/ja/SharedRules/default.yaml b/Rules/Languages/ja/SharedRules/default.yaml
index d57b6895..97d5dc15 100644
--- a/Rules/Languages/ja/SharedRules/default.yaml
+++ b/Rules/Languages/ja/SharedRules/default.yaml
@@ -127,7 +127,7 @@
   - t: "ルート"
   - test:
       if: "$Verbosity!='Terse'"
-      then: [t: "の"]    # phrase("the root 'of' x")
+      then: [t: "オブ"]    # phrase("the root 'of' x")
   - x: "*[1]"
   - pause: short
   - test:
@@ -145,7 +145,7 @@
   - t: "根指数" # phrase("the 'root with index' 3 of 5")
   - x: "*[1]"
   - pause: short
-  - t: "の"              # phrase("the root 'of' x")
+  - t: "オブ"              # phrase("the root 'of' x")
   - x: "*[2]"
   - pause: short
   - test:
@@ -636,7 +636,7 @@
   match: .
   replace:
   - x: "*[1]"
-  - t: "の"      # phrase(the sine 'of' x )
+  - t: "オブ"      # phrase(the sine 'of' x )
   - pause: auto
   - x: "*[position() > 1]"
  
@@ -736,7 +736,7 @@
       - test:
           if: "$Verbosity != 'Terse' and not(contains(@data-intent-property, ':literal:')) and
                not(count(*)=2 and (IsInDefinition(*[1], 'TrigFunctionNames') or IsInDefinition(name(.), 'TerseFunctionNames')) and IsNode(*[2], 'simple'))"
-          then: [t: "の", pause: auto]      # phrase(sine 'of' 5)
+          then: [t: "オブ", pause: auto]      # phrase(sine 'of' 5)
       - insert:
           nodes: "*"
           replace:
diff --git a/Rules/Languages/ja/unicode.yaml b/Rules/Languages/ja/unicode.yaml
index a5cd4ef9..a9695882 100644
--- a/Rules/Languages/ja/unicode.yaml
+++ b/Rules/Languages/ja/unicode.yaml
@@ -309,7 +309,7 @@
               preceding-sibling::*[1][IsInDefinition(., 'GeometryShapes')] or
               (@data-changed='added' and ancestor-or-self::*[contains(@data-intent-property, ':literal:')])
             )"
-        then: [t: "の"]
+        then: [t: "オブ"]
  - "⁢": [t: ""]                                   # 0x2062
  - "⁣": [t: ""]                                   # 0x2063
  - "⁤": [t: "および"]                                # 0x2064
diff --git a/tests/Languages/ja/ja.rs b/tests/Languages/ja/ja.rs
index b56ebcbb..d9cea0a3 100644
--- a/tests/Languages/ja/ja.rs
+++ b/tests/Languages/ja/ja.rs
@@ -109,7 +109,7 @@ fn negative_number() -> Result<()> {
 fn gradient() -> Result<()> {
     let expr = "<math><mo>&#x2207;</mo><mi mathvariant='normal'>F</mi></math>";
     test_prefs("ja", "SimpleSpeak", vec![("Verbosity", "Terse")], expr, "デル 大文字 f")?;
-    test_prefs("ja", "SimpleSpeak", vec![("Verbosity", "Verbose")], expr, "勾配 の 大文字 f")?;
+    test_prefs("ja", "SimpleSpeak", vec![("Verbosity", "Verbose")], expr, "勾配 オブ 大文字 f")?;
     return Ok(());
 }
 
@@ -195,7 +195,7 @@ fn subscript() -> Result<()> {
 #[test]
 fn sine_function() -> Result<()> {
     let expr = "<math><mi>sin</mi><mo>&#x2061;</mo><mi>x</mi></math>";
-    test("ja", "SimpleSpeak", expr, "サイン の x")?;
+    test("ja", "SimpleSpeak", expr, "サイン オブ x")?;
     return Ok(());
 }