UTC to JST converter
Coordinated Universal Time (UTC) is typically 9 hours behind Japan Standard Time (JST).
Coordinated Universal Time → Japan Standard Time, hour by hour below.
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Coordinated Universal Time (UTC) is UTC+0 with no daylight saving. It covers the global reference used in aviation, computing and science.
Japan Standard Time (JST) is UTC+9 with no daylight saving. It covers Tokyo, Osaka and Sapporo (Seoul shares the same clock).
Japan Standard Time is typically 9 hours ahead of Coordinated Universal Time, all year round; neither zone observes daylight saving.
Time difference between Coordinated Universal Time and Japan Standard Time
Japan Standard Time is typically 9 hours ahead of Coordinated Universal Time, all year round; neither zone observes daylight saving. Put the other way around: japan Standard Time (JST) is typically 9 hours ahead of Coordinated Universal Time (UTC). The table above shows the difference hour by hour using today's actual offsets.
Best time to call Japan Standard Time from Coordinated Universal Time
There's no 9-to-5 overlap between Coordinated Universal Time and Japan Standard Time, so one side always has to flex. The practical slots: 7:00 AM in Coordinated Universal Time is 4:00 PM in Japan Standard Time.
UTC to JST, hour by hour
Today's actual offsets. Rows where both zones are inside 9am–5pm working hours are highlighted.