Japan Standard Time (jst) is used in Japan. The IANA timezone identifier is Asia/Tokyo.

MUMBAI to JST Time Converter

Q: Where is mumbai used?

MUMBAI (Kolkata) (mumbai) is used in India. The IANA timezone identifier is Asia/Kolkata.

MUMBAI (Kolkata) → Japan Standard Time

MUMBAI = UTC+5:30JST = UTC+9

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

JST (Tokyo)

Japan · +3.5h

12:30

London

United Kingdom · -4.5h

04:30

New York

USA · -9.5h

23:30-1 day

Dubai

United Arab Emirates · -1.5h

07:30

Sydney

Australia · +4.5h

13:30

Time difference: Mumbai and JST (Tokyo)

Mumbai is 4 hours 30 minutes behind JST (Tokyo). When Mumbai clocks hit noon, JST (Tokyo) reads 15:00.

Mumbai observes Asia/Kolkata and JST (Tokyo) observes Asia/Tokyo — a 3.5 hours 30 minutes gap between them.

Business hours comparison

Every working day, Mumbai and JST (Tokyo) are both in business hours for 4.5 hours simultaneously.

00:0006:0012:0018:0024:00

Mumbai

JST (Tokyo)

Overlap (4.5h)

Optimal meeting slots

Mumbai and JST (Tokyo) share 4.5 hours of business hours overlap daily. Showing the 3 most balanced slots — see the time table below for the full window.

09:00 Mumbai / 12:00 Tokyo✓ Both working

10:00 Mumbai / 13:00 Tokyo✓ Both working

11:00 Mumbai / 14:00 Tokyo✓ Both working

Assumes a standard 9 AM–5 PM workday in each location's local timezone.

Holiday calendar for both locations

Mumbai

No upcoming public holidays this year.

JST (Tokyo)7 holidays

Jul 20Marine Day

Aug 11Mountain Day

Sep 21Respect for the Aged Day

Sep 23Autumnal Equinox Day

Oct 12Sports Day

Working across Mumbai and JST (Tokyo)

Coordinating between Mumbai (India) and JST (Tokyo) (Japan) means working around a 3.5-hour time difference. The 4.5-hour overlap window gives both teams a natural slot for real-time collaboration without anyone working outside normal hours.

💡 Best practice for cross-timezone meetings

✅

Schedule at 09:00–10:00 (Mumbai) for a 12:00–13:00 slot in JST (Tokyo) — the sweet spot where both teams are working.

✅

Schedule at 10:00–11:00 (Mumbai) for a 13:00–14:00 slot in JST (Tokyo) — the sweet spot where both teams are working.

✅

Schedule at 11:00–12:00 (Mumbai) for a 14:00–15:00 slot in JST (Tokyo) — the sweet spot where both teams are working.

Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.

Install ClockinSync Free →

Drag the slider at the top to convert any Mumbai time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.

MUMBAI (Mumbai) ↔ JST (Tokyo)

5h of business hours overlap daily (09:00–17:00)

MUMBAI (Mumbai)

JST (Tokyo)

00:00

03:30

01:00

04:30

02:00

05:30

03:00

06:30

04:00

07:30

05:00

08:30

06:00

09:30Working

07:00

10:30Working

08:00

11:30Working

09:00Working

12:30Working

10:00Working

13:30Working

11:00Working

14:30Working

12:00Working

15:30Working

13:00Working

16:30Working

14:00Working

17:30off

15:00Working

18:30off

16:00Working

19:30off

17:00

20:30

18:00

21:30

19:00

22:30

20:00

23:30

21:00

00:30+1d

22:00

01:30+1d

23:00

02:30+1d

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between mumbai and jst?

MUMBAI (Kolkata) (mumbai) is UTC+5:30 and Japan Standard Time (jst) is UTC+9. The difference between them is 3.5 hours.

Where is mumbai used?

MUMBAI (Kolkata) (mumbai) is used in India and surrounding regions. The IANA timezone identifier is Asia/Kolkata.

Where is jst used?

Japan Standard Time (jst) is used in Japan and surrounding regions. The IANA timezone identifier is Asia/Tokyo.

How do I convert mumbai to jst?

Use the interactive converter above. Drag the time slider to any mumbai time and the jst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular MUMBAI conversions

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Popular JST conversions

London → JST New York → JST Dubai → JST Sydney → JST Paris → JST Berlin → JST Singapore → JST Los Angeles → JST Toronto → JST Mumbai → JST