What is the time difference between Tokyo and Mumbai?

Tokyo (JST, UTC+9) is always 3 hours 30 minutes ahead of Mumbai (IST, UTC+5:30). Neither Japan nor India observes Daylight Saving Time, so this offset is constant throughout the year.

Does Tokyo observe Daylight Saving Time?

No. Japan abolished DST in 1952 and has not used it since. Tokyo stays on JST (UTC+9) all year.

Does Mumbai observe Daylight Saving Time?

No. India does not observe Daylight Saving Time. Mumbai uses IST (UTC+5:30) all year, making the Tokyo–Mumbai gap a fixed 3 hours 30 minutes.

Why does India use a half-hour offset?

India chose UTC+5:30 when standardizing time across the country to best average the solar noon across its wide east–west span. This results in the unusual 30-minute fraction relative to UTC.

What are the best meeting times when calling from Tokyo to Mumbai?

With Tokyo 3.5 hours ahead, standard business hours overlap well. Tokyo 09:00–18:00 JST equals Mumbai 05:30–14:30 IST, and Mumbai 09:00–18:00 IST equals Tokyo 12:30–21:30 JST. The best mutual overlap is Tokyo 12:30–18:00 / Mumbai 09:00–14:30.

Is this tool accurate for scheduling?

Yes. It uses the IANA timezone database embedded in your browser — the same source used by operating systems and calendar apps worldwide. Accuracy depends on your device clock being synchronized via NTP, which most devices do automatically.

Time Difference: Tokyo to Mumbai

See the current time in Tokyo (JST, UTC+9) and Mumbai (IST, UTC+5:30) side by side, with the fixed 3.5-hour gap, updated live every second.

Tokyo, Japan

--:--:--

JST UTC+9

Mumbai, India

--:--:--

IST UTC+5:30

Current Offset

+3 hours 30 min

Tokyo is 3 hours 30 minutes ahead of Mumbai — fixed year-round

Convert Tokyo Time to Mumbai Time

Subtract 3 hours 30 minutes from Tokyo time to get Mumbai time

Tokyo (JST)	Mumbai (IST)

Meeting Overlap Finder

Business hours (09:00–18:00) highlighted — best overlap shaded

Tokyo (JST)	Mumbai (IST)	Status

Neither Japan nor India observes Daylight Saving Time. The Tokyo–Mumbai gap of 3 hours 30 minutes is constant every day of the year.

Summary

This tool displays the live current time in both Tokyo (Asia/Tokyo — JST, UTC+9 year-round, no DST) and Mumbai (Asia/Kolkata — IST, UTC+5:30 year-round, no DST) side by side. Neither city observes Daylight Saving Time, so the offset between them is a constant 3 hours 30 minutes — Tokyo is always ahead. Use this tool to schedule calls between Japan and India, coordinate remote teams, or plan travel across these two time zones.

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Asia/Tokyo time (JST, UTC+9) using the IANA timezone database built into modern browsers.
The same moment is converted to Asia/Kolkata time (IST, UTC+5:30), which covers all of India including Mumbai.
The UTC offsets of both cities are compared to calculate the exact gap of 3 hours 30 minutes.
All three values — Tokyo time, Mumbai time, and the offset — refresh every second.
Because neither Japan nor India observes DST, the offset never changes.

Use cases

Scheduling video calls between Tokyo and Mumbai offices.
Checking if a colleague in Mumbai is still at their desk.
Planning Japan–India travel and arrival time comparisons.
Remote teams coordinating daily standups across Japan and India.
Finding overlapping business hours for Tokyo–Mumbai meetings.
Converting a Tokyo meeting time to its Mumbai equivalent.
Journalists in Tokyo checking broadcast times for live Indian events.
Students and teachers arranging online lessons between Japan and India.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu