Number::Phone::JP is a simple module to validate Japanese phone number formats. The Japanese phone numbers are regulated by Ministry of Internal Afairs and Communications of Japan. You can validate what a target number is valid from this regulation point of view.

There are many categories for type of telephones in Japan. This module is able to be used narrowed down to the type of phones.

This module only validates what a phone number agrees on the regulation. Therefore, it does *NOT* validate what a phone number actually exists.

This validation needs only an area (or category) prefix and behind it. The separator of number behind the prefix is ignored.