IST to JST Converter

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

IST
—
JST
—

IST and JST are the same time

IST to JST Conversion Table

ISTJST
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 IST)

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

IST (UTC+5:30) — India Standard Time, fixed year-round. JST (UTC+9) — Japan Standard Time, fixed year-round.

Both countries have no DST, making IST↔JST one of the world's most predictable timezone pairs. The 3:30 gap is permanent — no March/October recalculations needed.

Best overlap: 9:00 AM–1:00 PM IST = 12:30–4:30 PM JST. Indian mornings land in Japanese afternoons — a workable window for the growing India–Japan tech and manufacturing corridor.

Frequently Asked Questions

How many hours is IST behind JST?

IST (India Standard Time, UTC+5:30) is 3 hours 30 minutes behind JST (Japan Standard Time, UTC+9). Neither India nor Japan observes DST, so this gap is completely fixed throughout the year — always 3:30, never changing.

What is 9 AM IST in JST?

9:00 AM IST (Mumbai/Delhi) is 12:30 PM JST (Tokyo). Indian morning business hours (9 AM–1 PM IST) correspond to Japanese afternoon hours (12:30 PM–4:30 PM JST), making the India-to-Japan direction slightly more workable for morning IST standups.

What is the best time to call Tokyo from Bangalore?

The best window for Bangalore (IST) to Tokyo (JST) calls is 9:00 AM–1:00 PM IST = 12:30–4:30 PM JST. Indian morning hours reach Japan in the afternoon before the close of business. This is the standard window for India–Japan tech and automotive sector collaboration.

Do IST and JST ever have a different gap?

No. JST and IST are both fixed offsets with no DST. JST is always UTC+9 and IST is always UTC+5:30. The gap is always exactly 3 hours 30 minutes, 365 days a year — making JST↔IST one of the most predictable timezone pairs for scheduling.