Time Difference: Tokyo to Istanbul

Summary

See the current time in Tokyo and Istanbul side by side, with the exact hour offset and business-hours overlap, updated live every second.

How it works

1. Your browser reads the current moment from your device clock.
2. It converts that moment to Asia/Tokyo time (JST, UTC+9) using the IANA timezone database built into modern browsers.
3. The same moment is converted to Europe/Istanbul time (TRT, UTC+3).
4. The UTC offsets of both cities are compared to calculate the exact hour difference.
5. All values — Tokyo time, Istanbul time, and the offset — refresh every second.
6. Neither Tokyo nor Istanbul observes DST, so the offset is a fixed 6 hours year-round.

Use cases

• Scheduling video calls between Tokyo and Istanbul offices.
• Checking if a colleague in Istanbul is still at their desk while working in Tokyo.
• Planning travel between Japan and Turkey.
• Remote teams coordinating standups across Japan and Turkey.
• Finding overlapping business hours for Tokyo-Istanbul meetings.
• Verifying that neither city uses daylight saving time.
• Finance professionals tracking Tokyo and Istanbul market hours simultaneously.
• Students and teachers arranging online lessons across Japan and Turkey.

Frequently Asked Questions