JST to GMT Converter
Japan Standard Time to UK Time: live clocks, today's full conversion table, and the best hours to call. Daylight saving is handled automatically.
About JST and GMT
Japan Standard Time (JST) is used across Japan, including Tokyo and Osaka. Japan does not observe daylight saving time.
UK Time (GMT/BST) is used in London, Manchester and Edinburgh. Clocks shift to BST (British Summer Time) from late March to late October.
Time difference between JST and GMT
GMT is 9 hours behind JST in winter (January) and 8 hours behind JST in summer (July), because of daylight saving changes. The clocks and table above are computed live from the official IANA time zone database in your browser, so daylight saving transitions are always already included.
JST to GMT conversion for every hour
9:00 AM JST is 12:00 AM GMT. 10:00 AM JST is 1:00 AM GMT. 12:00 PM JST is 3:00 AM GMT. 2:00 PM JST is 5:00 AM GMT. 3:00 PM JST is 6:00 AM GMT. 4:00 PM JST is 7:00 AM GMT. 5:00 PM JST is 8:00 AM GMT. The table at the top of this page lists all 24 hours, updated live for today's date.
Best hours for meetings
Scan the table for rows where both sides land inside working hours (9:00 to 18:00). Rows where one side is early morning or late evening are workable for a quick call; avoid rows where either side is in the middle of the night. To add a third city, type it into the planner below, or open the full time zone converter and meeting planner.
Related conversions
GMT to JST IST to JST JST to IST EST to JST JST to EST PST to JST JST to PST UTC to JST