diff --git a/README.md b/README.md
index 911d3b530..5ebe20203 100644
--- a/README.md
+++ b/README.md
@@ -86,7 +86,7 @@ Passing anything other than a string is an error.
 - **isLowercase(str)** - check if the string is lowercase.
 - **isMACAddress(str)** - check if the string is a MAC address.
 - **isMD5(str)** - check if the string is a MD5 hash.
-- **isMobilePhone(str, locale)** - check if the string is a mobile phone number, (locale is one of `['ar-DZ', 'ar-SA', 'ar-SY', 'cs-CZ', 'de-DE', 'da-DK', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-CA', 'en-ZA', 'en-ZM', 'es-ES', 'fi-FI', 'fr-FR', 'hu-HU', 'ms-MY', 'nb-NO', 'nn-NO', 'pl-PL', 'pt-PT', 'ru-RU', 'tr-TR', 'vi-VN', 'zh-CN', 'zh-TW']`).
+- **isMobilePhone(str, locale)** - check if the string is a mobile phone number, (locale is one of `['ar-DZ', 'ar-SA', 'ar-SY', 'cs-CZ', 'de-DE', 'da-DK', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-CA', 'en-ZA', 'en-ZM', 'es-ES', 'fi-FI', 'fr-FR', 'hu-HU', 'ja-JP', 'ms-MY', 'nb-NO', 'nn-NO', 'pl-PL', 'pt-PT', 'ru-RU', 'tr-TR', 'vi-VN', 'zh-CN', 'zh-TW']`).
 - **isMongoId(str)** - check if the string is a valid hex-encoded representation of a [MongoDB ObjectId][mongoid].
 - **isMultibyte(str)** - check if the string contains one or more multibyte chars.
 - **isNull(str)** - check if the string is null (has a length of zero).
diff --git a/src/lib/isMobilePhone.js b/src/lib/isMobilePhone.js
index 42db9c959..e8e249326 100644
--- a/src/lib/isMobilePhone.js
+++ b/src/lib/isMobilePhone.js
@@ -21,6 +21,7 @@ const phones = {
   'fi-FI': /^(\+?358|0)\s?(4(0|1|2|4|5)?|50)\s?(\d\s?){4,8}\d$/,
   'fr-FR': /^(\+?33|0)[67]\d{8}$/,
   'hu-HU': /^(\+?36)(20|30|70)\d{7}$/,
+  'ja-JP': /^(\+?81|0)\d{1,4}[ \-]?\d{1,4}[ \-]?\d{4}$/,
   'ms-MY': /^(\+?6?01){1}(([145]{1}(\-|\s)?\d{7,8})|([236789]{1}(\s|\-)?\d{7}))$/,
   'nb-NO': /^(\+?47)?[49]\d{7}$/,
   'nn-NO': /^(\+?47)?[49]\d{7}$/,
diff --git a/test/validators.js b/test/validators.js
index d77b0ca7b..d4c4d9176 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -2348,6 +2348,36 @@ describe('Validators', function () {
       ],
       args: ['ms-MY'],
     });
+
+    test({
+      validator: 'isMobilePhone',
+      valid: [
+        '0312345678',
+        '0721234567',
+        '09012345688',
+        '06 1234 5678',
+        '072 123 4567',
+        '0729 12 3456',
+        '07296 1 2345',
+        '072961 2345',
+        '090 1234 5678',
+        '03-1234-5678',
+        '+81312345678',
+        '+816-1234-5678',
+        '+8190-1234-5678',
+      ],
+      invalid: [
+        '12345',
+        '',
+        '045555717112312332423423421',
+        'Vml2YW11cyBmZXJtZtesting123',
+        '+3-585-0555-7171',
+        '0 1234 5689',
+        '16 1234 5689',
+        '03_1234_5689',
+      ],
+      args: ['ja-JP'],
+    });
   });
 
   it('should validate currency', function () {