Japan Post
The Japan Post barcode is a clocked barcode similar in appearance to 4 State code, with a mod 19 checkdigit. The elements are normally reproduced at 8, 9, 10, or 11.5 point, although values between 7 and 12 point are permitted.
The symbol will accept digits and uppercase letters and the hyphen. The data consists of a 7 digit postal code plus address data. If the address data is less than 13 characters the remaining character positions are filled with control characters to make the length 20.
The postal code section may have a hyphen at the 4th character position (eg. 123-4567) although this hyphen does not appear in the encoded data. There may also be a hyphen between the postal code and the address data (eg. 154-0023-1-3-2-A-507). Again this hyphen does not appear in the encoded data. Note that the remaining hyphens are encoded.
Korean Postal Authority