| as_pref | Coerce an object to a jpcity_pref object |
| city_code | Get city codes |
| city_convert | Convert to cities at different points in time |
| city_desig_merge | Merge designated city wards |
| city_desig_split | Split designated cities into wards |
| city_interval | Get city duration |
| city_name | Get city names |
| find_city | Find cities by string patterns |
| get_city | Get cities at a specific point in time |
| is_city | Test if the object is a jpcity_city object |
| is_pref | Test if the object is a jpcity_pref object |
| parse_city | Parse city codes |
| parse_pref | Parse prefecture codes or names |
| pref_code | Get prefecture codes |
| pref_name | Get prefecture names |