JST to IST Converter – Convert Japan Time to Indian Time

IST is 3 hours 30 minutes behind JST, so to convert mentally, subtract 3 hours 30 minutes to your JST time. For example: 9:00 AM JST = 5:30 AM IST.

IST (India Standard Time, UTC+5:30) is 3 hours 30 minutes behind JST (Japan Standard Time, UTC+9) during standard time. For example, 9:00 AM JST = 5:30 AM IST.

The best overlap for standard business hours (9 AM–5 PM) in both zones is 12:30–17:00 JST = 09:00–13:30 IST. Schedule recurring calls in this window to keep both sides within normal working hours. Remember to re-check the window in March and November (or March/October for European zones) when DST transitions can shift the overlap by 1 hour.

Japan does not observe Daylight Saving Time. JST remains constant year-round, which simplifies conversions.

Major cities in the JST (Japan Standard Time, UTC+9) timezone include: Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Fukuoka. JST is a fixed-offset zone — these cities do not observe Daylight Saving Time.

Major cities in the IST (India Standard Time, UTC+5:30) timezone include: Mumbai, New Delhi, Bangalore, Chennai, Kolkata, Hyderabad, Pune. IST is a fixed-offset zone — these cities do not observe Daylight Saving Time.

IST is 3 hours 30 minutes behind JST. The best overlap for business hours is 12:30–17:00 JST = 09:00–13:30 IST. Always include both local times in calendar invites (for example, "2:00 PM JST / 10:30 AM IST IST"). Double-check around March and November (or March/October for European zones) when DST transitions can shift the offset by 1 hour. For full scheduling guidance, see our international meeting times guide.