| convert_jdate | Convert Japanese date format to date object |
| convert_jyear | Convert Japanese imperial year to Anno Domini |
| dl_zipcode_file | Download a zip-code file |
| find_date_by_wday | Find out the date of the specific month and weekday |
| is_jholiday | Is x a public holidays in Japan? |
| is_zipcode | Test zip-code |
| jholiday | Public holidays in Japan |
| jholiday_spec | Public holidays in Japan |
| jpnprefs | Prefectural informations in Japan |
| kansuji2arabic | Convert kansuji character to arabic |
| kansuji2arabic_all | Convert kansuji character to arabic |
| read_zipcode | Read Japan post's zip-code file |
| separate_address | Separate address elements |
| str_conv_hirakana | Converts the kind of string used as Japanese |
| str_conv_normalize | Converts the kind of string used as Japanese |
| str_conv_romanhira | Converts the kind of string used as Japanese |
| str_conv_zenhan | Converts the kind of string used as Japanese |
| str_jconv | Converts the kind of string used as Japanese |
| zipcode_spacer | Insert and remove zip-code connect character |