Japan Standard Time (日本標準時, Nihon Hyōjunji, Japanese pronunciation: [nihon çɔ̞ː(d)ʒʉn(d)ʒi] or Chūō Hyōjunji (中央標準時, Japanese pronunciation: [tʃʉːɔ̞ː çɔ̞ː(d)ʒʉn(d)ʒi]), JST) is the standard time zone in Japan, 9 hours ahead of UTC (i.e. it is UTC+09:00). There is no daylight saving time, though its introduction has been debated several times. During World War II, it was often called Tokyo Standard Time. Japan Standard Time is the same as Korean Standard Time, Indonesian Eastern Standard Time, East-Timorese Standard Time and Yakutsk Time (Russia).