GMT to JST Converter
UK Time to Japan Standard Time: live clocks, today's full conversion table, and the best hours to call. Daylight saving is handled automatically.
About GMT and JST
UK Time (GMT/BST) is used in London, Manchester and Edinburgh. Clocks shift to BST (British Summer Time) from late March to late October.
Japan Standard Time (JST) is used across Japan, including Tokyo and Osaka. Japan does not observe daylight saving time.
Time difference between GMT and JST
JST is 9 hours ahead of GMT in winter (January) and 8 hours ahead of GMT 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.
GMT to JST conversion for every hour
9:00 AM GMT is 6:00 PM JST. 10:00 AM GMT is 7:00 PM JST. 12:00 PM GMT is 9:00 PM JST. 2:00 PM GMT is 11:00 PM JST. 3:00 PM GMT is 12:00 AM JST the next day. 4:00 PM GMT is 1:00 AM JST the next day. 5:00 PM GMT is 2:00 AM JST the next day. 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
JST to GMT IST to GMT GMT to IST EST to GMT GMT to EST GMT to PST PST to GMT GMT to CST