| convert_jdate | Convert Japanese date format to date object | 
| convert_jyear | Convert Japanese imperial year to Anno Domini | 
| convert_prefecture | Convert prefecture names to roman or kanji | 
| convert_prefecture_from_kana | Convert prefecture names from kana | 
| dl_zipcode_file | Download a zip-code file | 
| find_date_by_wday | Find out the date of the specific month and weekday | 
| harmonize_prefecture_name | Harmonize the notation of Japanese prefecture names. | 
| hiragana | Create kana vector | 
| is_jholiday | Is x a public holidays in Japan? | 
| is_prefecture | Check correctly prefecture names | 
| is_zipcode | Test zip-code | 
| jholiday | Public holidays in Japan | 
| jholiday_spec | Public holidays in Japan | 
| jpnprefs | Prefectural informations in Japan | 
| kana | Create kana vector | 
| kansuji2arabic | Convert kansuji character to arabic | 
| kansuji2arabic_all | Convert kansuji character to arabic | 
| kansuji2arabic_num | Convert kansuji character to arabic | 
| kansuji2arabic_str | Convert kansuji character to arabic | 
| katakana | Create kana vector | 
| label_kansuji | Label numbers in Kansuji format | 
| label_kansuji_suffix | Label numbers in Kansuji format | 
| 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 | 
| str_jnormalize | Converts characters following the rules of 'neologd' | 
| zipcode_spacer | Insert and remove zip-code connect character |