JST to IST Converter

Japan Standard Time → India Standard Time · JST is 3 hours 30 minutes ahead of IST

JST
—
IST
—

JST and IST are the same time

JST to IST Conversion Table

JSTIST
12:00 AM12:00 AM
1:00 AM1:00 AM
2:00 AM2:00 AM
3:00 AM3:00 AM
4:00 AM4:00 AM
5:00 AM5:00 AM
6:00 AM6:00 AM
7:00 AM7:00 AM
8:00 AM8:00 AM
9:00 AM9:00 AM
10:00 AM10:00 AM
11:00 AM11:00 AM
12:00 PM12:00 PM
1:00 PM1:00 PM
2:00 PM2:00 PM
3:00 PM3:00 PM
4:00 PM4:00 PM
5:00 PM5:00 PM
6:00 PM6:00 PM
7:00 PM7:00 PM
8:00 PM8:00 PM
9:00 PM9:00 PM
10:00 PM10:00 PM
11:00 PM11:00 PM

Green rows = business hours overlap (9:00 AM – 6:00 PM JST)

Major JST Cities
  • Tokyo
  • Osaka
  • Kyoto
  • Yokohama
  • Sapporo
  • Fukuoka
Major IST Cities
  • Mumbai
  • Delhi
  • Bangalore
  • Hyderabad
  • Chennai
  • Pune
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JST vs IST — Tokyo to Bangalore

JST (UTC+9) — Japan Standard Time. Fixed, no DST. IST (UTC+5:30) — India Standard Time. Fixed, no DST.

Both Japan and India have no Daylight Saving Time, making this one of the most predictable timezone pairs in the world. The 3:30 gap never changes — no seasonal recalculation needed.

Best overlap: 9:30 AM–1:00 PM IST = 1:00–4:30 PM JST. The Japan–India tech corridor (Tokyo ↔ Bangalore, Hyderabad, Pune) is increasingly active in software and automotive industries.

Frequently Asked Questions

How many hours is JST ahead of IST?

JST (Japan Standard Time, UTC+9) is 3 hours 30 minutes ahead of IST (India Standard Time, UTC+5:30). Neither Japan nor India observes Daylight Saving Time, making this a completely fixed offset — always 3.5 hours, year-round, with no seasonal changes.

What is 9 AM JST in IST?

9:00 AM JST (Tokyo) is 5:30 AM IST (Mumbai/Delhi). For Japan morning meetings, Indian participants are in very early morning. The best practical overlap is 10:00 AM–4:00 PM IST = 1:30 PM–7:30 PM JST — Indian business hours catch Tokyo afternoon.

What is the best time for Japan–India calls?

The best overlap window for Tokyo (JST) and Bangalore (IST) is 9:30 AM–1:00 PM IST = 1:00–4:30 PM JST. This gives India a productive morning window while Japan is in the afternoon. Japanese companies with Indian engineering teams often use 10:00 AM IST / 1:30 PM JST for standups.

Why is the JST to IST difference always 3 hours 30 minutes?

JST is UTC+9 and IST is UTC+5:30. The difference is 9 − 5.5 = 3.5 hours = 3 hours 30 minutes. Since neither Japan nor India observes DST, this gap is completely fixed throughout the year — one of the most predictable timezone pairs for international scheduling.