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

JST to MUMBAI Time Converter

Q: Where is mumbai used?

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

Japan Standard Time → MUMBAI (Kolkata)

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

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

Mumbai

India · -3.5h

05:30

London

United Kingdom · -8h

01:00

New York

USA · -13h

20:00-1 day

Dubai

United Arab Emirates · -5h

04:00

Sydney

Australia · +1h

10:00

JST (Tokyo) to Mumbai — exact time difference

JST (Tokyo) is 3 hours 30 minutes ahead of Mumbai. When JST (Tokyo) clocks hit noon, Mumbai reads 08:00.

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

Working hours overlap

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

00:0006:0012:0018:0024:00

JST (Tokyo)

Mumbai

Overlap (4.5h)

Optimal meeting slots

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

13:00 Tokyo / 09:00 Mumbai✓ Both working

14:00 Tokyo / 10:00 Mumbai✓ Both working

15:00 Tokyo / 11:00 Mumbai✓ Both working

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

Holiday calendar for both locations

JST (Tokyo)7 holidays

Jul 20Marine Day

Aug 11Mountain Day

Sep 21Respect for the Aged Day

Sep 23Autumnal Equinox Day

Oct 12Sports Day

Mumbai

No upcoming public holidays this year.

Working across JST (Tokyo) and Mumbai

Coordinating between JST (Tokyo) (Japan) and Mumbai (India) 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 13:00–14:00 (JST (Tokyo)) for a 09:00–10:00 slot in Mumbai — the sweet spot where both teams are working.

✅

Schedule at 14:00–15:00 (JST (Tokyo)) for a 10:00–11:00 slot in Mumbai — the sweet spot where both teams are working.

✅

Schedule at 15:00–16:00 (JST (Tokyo)) for a 11:00–12:00 slot in Mumbai — 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 JST (Tokyo) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.

JST (Tokyo) ↔ MUMBAI (Mumbai)

4h of business hours overlap daily (09:00–17:00)

JST (Tokyo)

MUMBAI (Mumbai)