JST to IST converter
Japan is 3½ hours ahead of India on every date of the year. Neither country moves its clocks, so the answer never needs a second look.
India is 3 hours 30 minutes behind Tokyo.
Japan and India on one working day
Tokyo starts work while India is still asleep, but the two offices share a good stretch of the day: Japan’s afternoon is India’s morning. Engineers, carmakers and electronics firms with teams in both countries build their calendars around that window.
Japanese companies with Indian teams
Indian offices open around the middle of the Japanese day.
- India’s 9:30 AM start = 1:00 PM in Tokyo
- Tokyo’s 6 PM finish = 2:30 PM in India
- So the live overlap is roughly 1–6 PM JST, or 9:30 AM–2:30 PM IST
Japan’s lunch hour, noon to 1 PM, is 8:30 AM–9:30 AM in India: a poor slot for a first call of the day.
Living in Japan, calling home
A Japanese evening is an Indian afternoon, which suits families on both sides.
- Tokyo 8–10 PM = India 4:30 PM–6:30 PM
- Tokyo 7 AM is only 3:30 AM in India, far too early
- A Sunday 11 AM call from Tokyo reaches India at 7:30 AM on Sunday
Tokyo’s market from India
The Tokyo Stock Exchange trades 9:00–11:30 AM and 12:30–3:30 PM Japan time.
- Morning session = 5:30 AM–8:00 AM IST
- Afternoon session = 9:00 AM–12:00 PM IST
- NSE opens at 9:15 AM IST = 12:45 PM JST, during Tokyo’s lunch break
That is why Indian traders already know how the Nikkei opened before their own market starts.
Flying between Japan and India
Nonstop flights between Tokyo and Delhi take roughly 8 to 9 hours.
- Heading east you lose 3½ hours, so night flights from Delhi arrive in Tokyo the next morning
- Heading west you gain them back, and a daytime flight from Tokyo lands in Delhi the same evening
A gap that stays at 3½ hours
Japan tried daylight saving time only briefly, from 1948 to 1951, and has stayed on UTC+9 ever since. India has not used it for decades and sits at UTC+5:30. With both fixed, Tokyo is always 3 hours 30 minutes ahead.
Because India is on a half hour and Japan is not, every full hour in Tokyo becomes a half hour in India. Subtract three and a half: 4 PM in Tokyo is 12:30 PM in India; 10:30 AM in India is 2:00 PM in Tokyo.
Korea uses the same clock as Japan
South Korea is also on UTC+9 and also skips daylight saving, so Seoul always shows the same time as Tokyo. Everything on this page applies equally to Korea Standard Time (KST): a 2 PM meeting in Seoul is 10:30 AM in India. The converter above accepts Seoul and Osaka as well as Tokyo.
Japan time to India time, every hour
The gap never changes, so one table covers the whole year and Korea as well. Shaded rows are the Japanese afternoon hours that fall inside an Indian working morning.
| Tokyo (JST) | India (IST)−3:30 | India, 24-hour−3:30 |
|---|---|---|
| 12:00 AM (midnight) | 8:30 PM prev. day | 20:30 prev. day |
| 1:00 AM | 9:30 PM prev. day | 21:30 prev. day |
| 2:00 AM | 10:30 PM prev. day | 22:30 prev. day |
| 3:00 AM | 11:30 PM prev. day | 23:30 prev. day |
| 4:00 AM | 12:30 AM | 00:30 |
| 5:00 AM | 1:30 AM | 01:30 |
| 6:00 AM | 2:30 AM | 02:30 |
| 7:00 AM | 3:30 AM | 03:30 |
| 8:00 AM | 4:30 AM | 04:30 |
| 9:00 AM | 5:30 AM | 05:30 |
| 10:00 AM | 6:30 AM | 06:30 |
| 11:00 AM | 7:30 AM | 07:30 |
| 12:00 PM (noon) | 8:30 AM | 08:30 |
| 1:00 PM | 9:30 AM | 09:30 |
| 2:00 PM | 10:30 AM | 10:30 |
| 3:00 PM | 11:30 AM | 11:30 |
| 4:00 PM | 12:30 PM | 12:30 |
| 5:00 PM | 1:30 PM | 13:30 |
| 6:00 PM | 2:30 PM | 14:30 |
| 7:00 PM | 3:30 PM | 15:30 |
| 8:00 PM | 4:30 PM | 16:30 |
| 9:00 PM | 5:30 PM | 17:30 |
| 10:00 PM | 6:30 PM | 18:30 |
| 11:00 PM | 7:30 PM | 19:30 |
“prev. day”: for Tokyo times before 3:30 AM, India is still on the previous date.
Quick answers
What time is it in India when it is 9 AM in Tokyo?
5:30 AM in India, on the same date.
How many hours ahead of India is Japan?
3 hours 30 minutes, on every date. Neither Japan nor India uses daylight saving time.
What time does the Tokyo Stock Exchange open in IST?
9 AM in Tokyo is 5:30 AM IST. The morning session ends at 8:00 AM IST and the afternoon session runs from 9:00 AM to 12:00 PM IST.
Does Japan have daylight saving time?
No. Japan used it only between 1948 and 1951 and has been on Japan Standard Time, UTC+9, all year since.
Is Korea time the same as Japan time?
Yes. Korea Standard Time and Japan Standard Time are both UTC+9 with no daylight saving, so Seoul is also 3 hours 30 minutes ahead of India.
What is a good meeting time between Japan and India?
Between 1 PM and 5 PM in Japan, which is 9:30 AM to 1:30 PM in India. Both offices are open and neither side is at lunch at the start.