Seoul and Osaka are on the same time. Both cities use UTC+9 (Korea Standard Time and Japan Standard Time). When it's 12:00 PM in Seoul, it's also 12:00 PM in Osaka.
Neither South Korea nor Japan observes daylight saving time, keeping them synchronized year-round.
Any time works! Since both cities share the same time zone, you can call during normal business hours (9:00 AM - 6:00 PM) without any conversion needed.
Seoul and Osaka are major East Asian cities with strong cultural and economic ties. Flights connect them in about 1.5 hours, making business and tourism travel extremely convenient.