diff --git a/README.md b/README.md
index 1e0d350..d49d4dd 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ chardet
 - ISO-2022-JP
 - ISO-2022-KR
 - ISO-2022-CN
-- Shift-JIS
+- Shift_JIS
 - Big5
 - EUC-JP
 - EUC-KR
diff --git a/src/encoding/mbcs.test.ts b/src/encoding/mbcs.test.ts
index 093a4d4..39c6d9a 100644
--- a/src/encoding/mbcs.test.ts
+++ b/src/encoding/mbcs.test.ts
@@ -3,8 +3,8 @@ import * as chardet from '..';
 describe('Multibyte Character Sets', () => {
   var base = __dirname + '/../test/data/encodings';
 
-  it('should return SHIFT-JIS', () => {
-    expect(chardet.detectFileSync(base + '/shiftjis')).toBe('Shift-JIS');
+  it('should return Shift_JIS', () => {
+    expect(chardet.detectFileSync(base + '/shiftjis')).toBe('Shift_JIS');
   });
 
   it('should return GB18030', () => {
diff --git a/src/encoding/mbcs.ts b/src/encoding/mbcs.ts
index 902c8de..57ea77c 100644
--- a/src/encoding/mbcs.ts
+++ b/src/encoding/mbcs.ts
@@ -201,11 +201,11 @@ class mbcs implements Recogniser {
 }
 
 /**
- * Shift-JIS charset recognizer.
+ * Shift_JIS charset recognizer.
  */
 export class sjis extends mbcs {
   name() {
-    return 'Shift-JIS';
+    return 'Shift_JIS';
   }
   language() {
     return 'ja';