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Convert IST to JST

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

When it's 12:00 PM IST, it's 3:30 PM JST

UTC+5:30 UTC+9 +3:30 hours

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.

IST 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
IST GMT+5:30
JST GMT+9
Overlap
Everyone available
Most available
Some overlap
Outside work hours
1 12:00 PM -- 1:00 PM IST
IST: 12:00 PM JST: 3:00 PM

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

9 / 10
2 11:00 AM -- 12:00 PM IST
IST: 11:00 AM JST: 2:00 PM

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

8.9 / 10
3 1:00 PM -- 2:00 PM IST
IST: 1:00 PM JST: 4:00 PM

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

8.9 / 10

Try the full Meeting Finder with custom work hours →

Time Difference & DST

JST is 3 hours 30 minutes ahead of IST. IST is at UTC+5:30 and JST is at UTC+9.

Neither IST nor JST has an upcoming DST transition within the next 12 months.

The conversion table above reflects the current DST state at build time. Use the interactive converter for live, date-specific conversions.

Major Cities

India Standard Time (IST)

  • Mumbai
  • Delhi
  • Bangalore

Japan Standard Time (JST)

  • Tokyo
  • Osaka
  • Yokohama

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