JST to IST: Japan to India Time Conversion Guide
Japan Standard Time (JST) is UTC+9. India Standard Time (IST) is UTC+5:30. The difference is 3 hours and 30 minutes, with Japan ahead. When it is 12:00 PM noon in Tokyo, it is 8:30 AM in Mumbai. When it is 6:00 PM in Osaka, it is 2:30 PM in Bangalore.
Neither Japan nor India observes daylight saving time. This makes JST-to-IST conversion completely predictable — the same 3.5-hour offset applies in January and July, with no seasonal adjustments to remember.
Quick Mental Math
To convert JST to IST: subtract 3 hours and 30 minutes. To convert IST to JST: add 3 hours and 30 minutes. The half-hour offset makes mental math slightly awkward, so here is a trick: subtract 4 hours, then add 30 minutes. 3:00 PM JST → 11:00 AM + 30 minutes → 11:30 AM IST.
24-Hour JST to IST Conversion Table
Japan (JST) → India (IST)
- 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
Best Meeting Times for Japan and India
With a 3.5-hour gap, the overlap between standard working hours (9 AM - 6 PM) is still generous — about 5.5 hours of shared time.
- Morning slot (Japan-friendly): 9:00 AM – 12:00 PM JST is 5:30 AM – 8:30 AM IST. Too early for most Indian teams.
- Best window: 12:30 PM – 6:00 PM JST is 9:00 AM – 2:30 PM IST. Both teams are in their working day. This is the ideal range for recurring calls.
- Afternoon slot (India-friendly): 6:00 PM – 7:30 PM JST is 2:30 PM – 4:00 PM IST. Japan is after hours, India has the full afternoon left.
For daily standups, 1:00 PM JST / 9:30 AM IST is a strong default. Japan is back from lunch, India is settled into the morning.
No Daylight Saving Complications
Japan abolished daylight saving time in 1952. India has never observed it. Unlike scheduling with the US, UK, or Europe — where you need to adjust twice a year — Japan-India calls stay at the same time all year round. Set it once and forget it.
Growing Japan-India Business Context
The Japan-India tech corridor has expanded significantly in recent years. Japanese companies like SoftBank, Rakuten, Sony, and Toyota have major investments and development partnerships in India. Indian IT firms — TCS, Infosys, Wipro — have had Tokyo and Osaka offices for over two decades.
The Japan-India Digital Partnership, signed in 2023, further strengthened collaboration in AI, semiconductor manufacturing, and cybersecurity. For engineers, managers, and business teams working across these two countries, understanding the time zone relationship is a daily necessity.
Common Scenarios
- Flights: A direct Tokyo-to-Delhi flight takes about 9 hours. Depart at 11:00 AM JST, arrive around 4:30 PM IST (11:00 AM + 9 hours − 3.5 hours).
- Stock markets: Tokyo Stock Exchange (TSE) opens at 9:00 AM JST (5:30 AM IST) and closes at 3:00 PM JST (11:30 AM IST). NSE/BSE opens at 9:15 AM IST (12:45 PM JST). Both are open from 12:45 PM – 3:00 PM JST / 9:15 AM – 11:30 AM IST.
- Live events: A sumo tournament evening bout at 5:00 PM JST is 1:30 PM IST — mid-afternoon viewing.
Convert Japan to India Time Instantly
Enter any JST time and see the IST equivalent. Handles any time zone pair worldwide.