JST to UTC Converter
Japan Standard Time to Coordinated Universal Time: live clocks, today's full conversion table, and the best hours to call. Daylight saving is handled automatically.
About JST and UTC
Japan Standard Time (JST) is used across Japan, including Tokyo and Osaka. Japan does not observe daylight saving time.
Coordinated Universal Time (UTC) is the global reference clock used in aviation, servers and log files. UTC never changes for daylight saving.
Time difference between JST and UTC
UTC is 9 hours behind JST throughout the year. 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 UTC conversion for every hour
9:00 AM JST is 12:00 AM UTC. 10:00 AM JST is 1:00 AM UTC. 12:00 PM JST is 3:00 AM UTC. 2:00 PM JST is 5:00 AM UTC. 3:00 PM JST is 6:00 AM UTC. 4:00 PM JST is 7:00 AM UTC. 5:00 PM JST is 8:00 AM UTC. 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
UTC to JST IST to JST JST to IST EST to JST JST to EST GMT to JST JST to GMT PST to JST