Time Difference Between Seattle and Tokyo

The time difference between Seattle and Tokyo is 17 hours. When it is 12:00 noon in Seattle, it is 05:00 in Tokyo. Seattle uses the America/Los_Angeles time zone (UTC-8), while Tokyo uses Asia/Tokyo (UTC+9).

Time Zone Details: Seattle vs Tokyo

Best Time to Schedule a Call

With a 17 hours gap, there is no standard business-hours overlap between Seattle and Tokyo. One party will need to adjust their schedule. Early mornings in Tokyo or late evenings in Seattle tend to be the most practical compromise.

Hour-by-Hour Time Conversion

Use this table to quickly convert any hour from Seattle time to Tokyo time. Rows highlighted in green indicate overlapping business hours in both cities.

Daylight Saving Time (DST) Impact

Neither Seattle nor Tokyo is currently observing daylight saving time. If either city observes DST, the time difference will change by 1 hour when DST begins or ends. Always double-check before scheduling across these time zones during March–April and October–November.

Practical Tips for Seattle–Tokyo Scheduling

• Video calls: Rotate call times between early-morning and late-evening slots to share the scheduling burden fairly.
• Email and async work: Send messages at the end of your workday so they arrive at the start of theirs. With a 17 hours offset, replies will often land by your next morning.
• Flight arrivals: A direct flight between these cities can cross 17 time zones. Factor in jet lag recovery — most travelers need roughly one day per hour of time difference to fully adjust.
• Use UTC as a neutral reference when coordinating with three or more time zones at once.

Compare Seattle and Tokyo with Other Cities

From Seattle

From Tokyo

Frequently Asked Questions

What is the time difference between Seattle and Tokyo?

The time difference is 17 hours. Tokyo is 17 hours ahead of Seattle.

Does the time difference change during the year?

It can. If either Seattle or Tokyo observes daylight saving time, the gap will shift by 1 hour during the transition periods (typically March–April and October–November).

When is the best time to call from Seattle to Tokyo?

There is no ideal window during standard business hours. Consider scheduling at the edges — early morning for the city that is ahead and late afternoon for the city that is behind.

How do I convert Seattle time to Tokyo time?

Add 17 hours to Seattle time to get Tokyo time. Use the hour-by-hour table above for a quick reference.

Related Pages

• Current time in Seattle — live clock, time zone details, DST status
• Current time in Tokyo — live clock, time zone details, DST status
• Time Difference Calculator — compare any two cities
• UTC-8 countries and cities
• UTC+9 countries and cities
• Current UTC Time
• All World Time Zones
• What Is a Time Zone?

For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.