What is the time difference between Tokyo and Seattle?

Tokyo (JST, UTC+9) is 17 hours ahead of Seattle during Pacific Standard Time (PST, UTC-8) and 16 hours ahead during Pacific Daylight Time (PDT, UTC-7). Japan does not observe Daylight Saving Time, so the offset changes only when Seattle shifts its clocks in spring and autumn.

Does Tokyo observe Daylight Saving Time?

No. Japan abolished DST in 1952 and has not used it since. Tokyo stays on JST (UTC+9) all year. Only Seattle shifts its clocks, which is why the Tokyo-Seattle gap alternates between 17 and 16 hours.

When does Seattle switch between PST and PDT?

Seattle (and the rest of the US Pacific Time zone) moves clocks forward one hour on the second Sunday of March at 02:00 PST, entering PDT (UTC-7). Clocks fall back on the first Sunday of November at 02:00 PDT, returning to PST (UTC-8).

What are the best meeting times when calling from Tokyo to Seattle?

The offset is large, so overlapping standard business hours (09:00–18:00) is very difficult. Tokyo at 09:00–10:00 JST corresponds to Seattle at 16:00–17:00 PST the previous day. The most practical window is Tokyo late afternoon (17:00–18:00 JST) aligning with Seattle early morning (00:00–01:00), which is outside normal hours. Many teams rely on asynchronous communication or use early Tokyo morning for late-Seattle evening calls.

Is this tool accurate for scheduling?

Yes. It uses the IANA timezone database embedded in your browser — the same source used by operating systems and calendar apps worldwide. Accuracy depends on your device clock being synchronized via NTP, which most devices do automatically.

PST (Pacific Standard Time) is UTC-8, observed in Seattle from November to March. PDT (Pacific Daylight Time) is UTC-7, observed from March to November during daylight saving. Together they form the America/Los_Angeles IANA timezone.

Time Difference: Tokyo to Seattle

See the current time in Tokyo and Seattle side by side, with the live UTC offset (JST is UTC+9, Seattle is PST or PDT), updated every second.

Tokyo, Japan

--:--:--

JST UTC+9

Seattle, United States

--:--:--

PST UTC-8

Current Offset

+17 hours

Tokyo is 17 hours ahead of Seattle

Convert Tokyo Time to Seattle Time

Based on the current offset — updates automatically

Tokyo (JST)	Seattle (PST/PDT)

Meeting Overlap Finder

Business hours (09:00–18:00) highlighted — overlap window shaded

Tokyo (JST)	Seattle (PST/PDT)	Status

Summary

This tool displays the live current time in both Tokyo (Asia/Tokyo — JST, UTC+9 year-round, no DST) and Seattle (America/Los_Angeles — PST UTC-8 in winter, PDT UTC-7 in summer) side by side. Because Tokyo never observes Daylight Saving Time and Seattle does, the offset between the two cities shifts twice a year: Tokyo is 17 hours ahead of Seattle on PST and 16 hours ahead on PDT. Use this tool to schedule calls from Japan to the US Pacific Northwest, coordinate remote teams, or plan travel between the two cities.

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Asia/Tokyo time (JST, UTC+9) using the IANA timezone database built into modern browsers.
The same moment is converted to America/Los_Angeles time (PST or PDT depending on the season).
The UTC offsets of both cities are compared to calculate the exact hour difference.
All three values — Tokyo time, Seattle time, and the offset — refresh every second.
When Seattle switches between PST and PDT, the displayed offset adjusts automatically from +17 to +16 hours.

Use cases

Scheduling video calls between Tokyo and Seattle offices.
Checking whether a colleague in Seattle has started their workday.
Planning Japan-to-Seattle travel and arrival time comparisons.
Remote teams coordinating standups across Japan and the US Pacific Northwest.
Finding overlapping business hours for Tokyo-Seattle meetings.
Converting a Tokyo meeting time to its Seattle equivalent.
Checking live sports start times for events broadcast from Japan to Seattle viewers.
Students arranging online lessons across Japan and Washington State.

Frequently Asked Questions

Last updated: 2026-06-15 · Reviewed by Nham Vu