Session overlap · Japan Standard Time
TSE & SSE overlap hoursin Tokyo time
Both exchanges are open at the same time between 10:30 and 15:30 Tokyo time, a 5h shared window. TSE trades 18:00–00:30 and SSE trades 18:30–00:00 in Tokyo time. Both run Monday to Friday, so the overlap occurs on weekdays only.
- 10:30
- Overlap starts (Tokyo)
- 15:30
- Overlap ends (Tokyo)
- 5h
- Shared trading time
Overlap window in Tokyo
10:30–15:30
Japan Standard TimeTimes assume the exchanges’ regular sessions and are converted from exchange local time to Japan Standard Time; holidays and early closes can remove the overlap on a given day.
| Market | Open (Japan Standard Time) | Close (Japan Standard Time) |
|---|---|---|
| TSE | 18:00 | 00:30 |
| SSE | 18:30 | 00:00 |
How the TSE–SSE overlap is calculated
The overlap is the intersection of each exchange’s regular trading session after converting both to Japan Standard Time. In this timezone, TSE runs 18:00–00:30 and SSE runs 18:30–00:00, so both are open together from 10:30 to 15:30 — 5h of shared trading time.
Weekends are excluded, and any full-day holiday or early close on either side shrinks the window for that date. Use the two holiday calendars below before planning a session that relies on the overlap, and check the live open/closed status if you need the current figure rather than the scheduled one.