Time difference between South Korea and Japan
Seoul and Tokyo share JST/KST year-round alignment.
Last updated: 2026-08-31
Quick answer
South Korea and Japan both use UTC+9 without daylight saving. Business hours align one-to-one—scheduling between Seoul and Tokyo is among the simplest international pairs.
Frequently asked questions
- Any seasonal shift?
- Neither country shifts clocks; offset is fixed year-round.