Convert IST to JST

India Standard Time (IST) to Japan Standard Time (JST)

When it's 12:00 PM in Mumbai, it's 3:30 PM in Tokyo

IST UTC+5:30 JST UTC+9 +3:30h

Interactive Converter

Pick any time and date to convert between IST and JST.

IST to JST Conversion Table

Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.

Mumbai (IST)	Tokyo (JST)
12:00 AM	3:30 AM
1:00 AM	4:30 AM
2:00 AM	5:30 AM
3:00 AM	6:30 AM
4:00 AM	7:30 AM
5:00 AM	8:30 AM
6:00 AM	9:30 AM
7:00 AM	10:30 AM
8:00 AM	11:30 AM
9:00 AM	12:30 PM
10:00 AM	1:30 PM
11:00 AM	2:30 PM
12:00 PM	3:30 PM
1:00 PM	4:30 PM
2:00 PM	5:30 PM
3:00 PM	6:30 PM
4:00 PM	7:30 PM
5:00 PM	8:30 PM
6:00 PM	9:30 PM
7:00 PM	10:30 PM
8:00 PM	11:30 PM
9:00 PM	12:30 AM +1 day
10:00 PM	1:30 AM +1 day
11:00 PM	2:30 AM +1 day

Best Meeting Window

Top meeting times for teams in IST and JST (9 AM -- 6 PM work hours, 1-hour meeting).

12a

3a

6a

9a

12p

3p

6p

9p

Mumbai

Tokyo

Overlap

Everyone available

Most available

Some overlap

Outside work hours

1 12:00 PM -- 1:00 PM in Mumbai

Mumbai: 12:00 PM Tokyo: 3:00 PM

All members within working hours. Everyone in mid-day range.

9 / 10

2 11:00 AM -- 12:00 PM in Mumbai

Mumbai: 11:00 AM Tokyo: 2:00 PM

All members within working hours. Everyone in mid-day range.

8.9 / 10

3 1:00 PM -- 2:00 PM in Mumbai

Mumbai: 1:00 PM Tokyo: 4:00 PM

All members within working hours. Everyone in mid-day range.

8.9 / 10

Try the Meeting Planner with custom work hours →

Time Difference & DST

JST is 3 hours 30 minutes ahead of IST all year.

Dates	Mumbai	Tokyo	Difference
Jan 1, 2026 – Dec 31, 2027	UTC+5:30	UTC+9	+3:30h

Mumbai, Tokyo do not use daylight saving time.

Use the interactive converter for a specific date.

Major Cities

India Standard Time (IST)

Mumbai
Delhi
Bangalore

Japan Standard Time (JST)

Tokyo
Osaka
Yokohama

Related Conversions

ET → IST +9:30/+10:30h

New York → Mumbai

IST → ET -10:30/-9:30h

Mumbai → New York

PT → IST +12:30/+13:30h

Los Angeles → Mumbai

IST → PT -13:30/-12:30h

Mumbai → Los Angeles

CT → IST +10:30/+11:30h

Chicago → Mumbai

IST → CT -11:30/-10:30h

Mumbai → Chicago

ET → JST +13/+14h

New York → Tokyo

JST → ET -14/-13h

Tokyo → New York

PT → JST +16/+17h

Los Angeles → Tokyo

JST → PT -17/-16h

Tokyo → Los Angeles

CET → IST +3:30/+4:30h

Berlin → Mumbai

IST → CET -4:30/-3:30h

Mumbai → Berlin

Popular Conversions

ET → IST +9:30/+10:30h

New York → Mumbai

ET → GMT +4/+5h

New York → GMT

ET → CET +5/+6h

New York → Berlin

PT → IST +12:30/+13:30h

Los Angeles → Mumbai

New York → Los Angeles

PT → GMT +7/+8h

Los Angeles → GMT

CET → IST +3:30/+4:30h

Berlin → Mumbai

UTC → ET -5/-4h

UTC → New York

ET → JST +13/+14h

New York → Tokyo

GMT → IST +5:30h

PT → CET +8/+9h

Los Angeles → Berlin

ET → AEST +14/+15/+16h

New York → Sydney

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