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JST to IST Time Converter

Use this JST to IST time converter to compare Japan and India time instantly. IST is 3 hours and 30 minutes behind JST, so 9:00 AM JST becomes 5:30 AM IST and 5:00 PM JST becomes 1:30 PM IST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.

JST Japan Standard Time
...
IST India Standard Time
...
Select a time to convert

JST to IST Quick Facts

Use this JST to IST converter to compare Japan and India time, check the 3 hours and 30 minutes gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 1:00 PM JST / 9:30 AM IST.

Time Difference
India Standard Time is 3 hours and 30 minutes behind Japan Standard Time
Useful when deadlines, handoffs, or calls cross workday boundaries.
Best Call Window
Best overlap starts around 1:00 PM JST and 9:30 AM IST.
Common Use Cases
Useful for remote teams, customer support windows, travel planning, webinars, and same-day deadline handoffs.

How to Convert JST to IST

Converting between Japan Standard Time and India Standard Time means accounting for a 3 hours and 30 minutes gap — here's how to do it in under 10 seconds with no sign-up.

Enter Your JST Time

Pick the date and time in Japan Standard Time (UTC +9) that you want to convert. Hit "Now" to load the current JST time instantly, or use "+1h" to step forward and compare.

Read the IST Result

The equivalent India Standard Time (UTC +5:30) time appears immediately. Since IST is 3 hours and 30 minutes behind of JST, most daytime conversions stay on the same calendar day.

Copy or Fine-Tune

Click "Copy Time" to grab the IST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.

Why Choose Our JST to IST Converter

Align JST–IST Meetings Instantly

When someone in Japan suggests 1:00 PM JST, that's 9:30 AM IST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.

Spot Date-Line Shifts at a Glance

Late-night JST times can land on a different date in IST because of the 3 hours and 30 minutes offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.

Handles DST Transitions Automatically

The half-hour offset between JST (UTC +9) and IST (UTC +5:30) already makes mental math tricky — add Daylight Saving Time and the gap can shift further. This converter uses live UTC offsets, so you're always accurate.

Never Miss a JST-Timed Event

Product launches, sports matches, and webinars are often announced in JST. Convert the event time to IST so you know exactly when to tune in — with a 3 hours and 30 minutes difference, a morning event in Japan falls during work hours in India.

JST to IST Time Conversion Chart

Quick-reference conversion table covering every hour of the day at a glance.

Complete 24-Hour Conversion

Japan Standard Time to India Standard Time full day schedule

12:00 AM
JST
→
8:30 PM
IST
(previous day)
1:00 AM
JST
→
9:30 PM
IST
(previous day)
2:00 AM
JST
→
10:30 PM
IST
(previous day)
3:00 AM
JST
→
11:30 PM
IST
(previous day)
4:00 AM
JST
→
12:30 AM
IST
5:00 AM
JST
→
1:30 AM
IST
6:00 AM
JST
→
2:30 AM
IST
7:00 AM
JST
→
3:30 AM
IST
8:00 AM
JST
→
4:30 AM
IST
9:00 AM
JST
→
5:30 AM
IST
10:00 AM
JST
→
6:30 AM
IST
11:00 AM
JST
→
7:30 AM
IST
12:00 PM
JST
→
8:30 AM
IST
1:00 PM
JST
→
9:30 AM
IST
2:00 PM
JST
→
10:30 AM
IST
3:00 PM
JST
→
11:30 AM
IST
4:00 PM
JST
→
12:30 PM
IST
5:00 PM
JST
→
1:30 PM
IST
6:00 PM
JST
→
2:30 PM
IST
7:00 PM
JST
→
3:30 PM
IST
8:00 PM
JST
→
4:30 PM
IST
9:00 PM
JST
→
5:30 PM
IST
10:00 PM
JST
→
6:30 PM
IST
11:00 PM
JST
→
7:30 PM
IST
The two zones in context

JST vs IST — cities and working rhythm

JST — Japan Standard Time
Primary cities: Tokyo, Osaka, Sapporo, Nagoya, Fukuoka

Japan — one of the few large economies that has no DST, so JST is JST year-round (UTC+9). Business hours 9 AM – 6 PM JST with strong presence-based culture (staying past 7 PM is common). Same offset as Korean Standard Time (KST).

IST — India Standard Time
Primary cities: Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata

Indian business hours run 10 AM – 7 PM IST typically; IT / BPO shifts commonly extend to cover US and UK working hours, so 3:30 PM – 12:30 AM IST (US overlap) and 12:30 PM – 9 PM IST (UK overlap) are the two second shifts you see most often. Weekend is Saturday-Sunday for most private-sector employers.

Time gap: IST is 3.5 hours behind JST (standard-time offsets — daylight-saving flips shift this by an hour twice a year in most northern-hemisphere zones).

JST to IST FAQ

Quick answers about daylight saving time, date changes, business-hour overlap, and the most common scheduling questions between Japan Standard Time and India Standard Time.

What is the time difference between JST and IST?

IST is 3 hours 30 minutes behind JST. JST is UTC +9:00 and IST is UTC +5:30 relative to UTC. Neither JST nor IST observes daylight saving time, so the 3 hours 30 minutes gap stays constant all year. That makes scheduling between them predictable.

When can JST and IST have business-hour overlap?

Aim for 12:00–17:00 JST, which is 09:00–14:00 IST. Both sides stay inside standard business hours.

Does JST or IST observe daylight saving time?

Neither JST nor IST observes daylight saving time, so the 3 hours 30 minutes gap stays constant all year. That makes scheduling between them predictable.

How do I quickly convert JST to IST?

To convert JST to IST, add 3 hours 30 minutes subtract from the JST time. Example: if it's 10:00 AM JST, it's 07:00 IST that day. The live converter at the top of this page handles DST automatically.

Why JST↔IST?

Japan-India business has grown sharply (Suzuki-Maruti, SoftBank, automotive supply chain, semiconductor cooperation). The 3.5-hour gap makes for clean overlap during regular Asia business hours.

What's the meeting overlap?

JST 1:00-4:00 PM = IST 9:30 AM-12:30 PM. Best window of the day. Both sides are in core business hours and neither has to start early or stay late.

Do either Japan or India observe DST?

Neither. JST (UTC+9) and IST (UTC+5:30) both stay constant year-round. The 3:30-hour gap never shifts, making this one of the easiest international corridors to schedule.

Popular JST Time Converters

Explore more JST conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.

Convert Other Time Zones to IST

Find the time difference from any major zone into India Standard Time. Use these pages when scheduling with India from a different region.

🇮🇳 Swap direction — IST to JST Converter