UTC+09:00 is an identifier for a time offset from UTC of +09:00.

During the Japanese occupations of British Borneo, Burma, Hong Kong, Dutch East Indies, Malaya, Philippines, Singapore, and French Indochina, it was used as a common time with Tokyo until the fall of the Empire of Japan.

Principal cities: Yakutsk, Blagoveshchensk, Chita, Tokyo, Osaka, Nagoya, Fukuoka, Yokohama, Sapporo, Hiroshima, Kyoto, Seoul, Busan, Daegu, Gwangju, Ulsan, Incheon, Jeju, Changwon, Pyongyang, Koror, Jayapura, Sorong, Ternate, Ambon, Dili.

This concerns areas within 127°30′ E and 142°30′ E longitude.