Tokyo is 17 hours ahead of Seattle in winter (PST UTC-8 → JST UTC+9) and 16 hours ahead in summer (PDT UTC-7 → JST UTC+9). A 9:00 AM start in Seattle is 2:00 AM JST (+1 day) in winter and 1:00 AM JST (+1 day) in summer in Tokyo. Best meeting window — Winter (PST): 4:00 PM – 7:00 PM PST (9:00 AM – 12:00 PM JST (+1 day)); Summer (PDT): 4:30 PM – 7:30 PM PDT (8:30 AM – 11:30 AM JST (+1 day)).
In Winter (PST) (17 hours difference), Seattle and Tokyo share 1 hour/day of 9:00 AM – 5:00 PM overlap (4:00 PM – 5:00 PM PST in Seattle = 9:00 AM – 10:00 AM JST (+1 day) in Tokyo). In Summer (PDT) (16 hours difference), 9–5 overlap drops to 0 hours, so live meetings use morning/evening shoulder windows.
Optimal Seattle–Tokyo shoulder bridge for Winter (PST) (17 hours gap) and Summer (PDT) (16 hours gap), ending at or before 9:00 PM local time.
Covers every hour where Seattle or Tokyo is outside 7:00 AM – 9:00 PM local time (17h/day in Winter (PST); 18h/day in Summer (PDT)).
| Seattle Time | Tokyo (Winter (PST → JST)) | Day Shift | Tokyo (Summer (PDT → JST)) | Call Status |
|---|---|---|---|---|
| 9:00 AM PST (Morning Start) | 2:00 AM JST (+1 day) | +1 day | 1:00 AM JST (+1 day) | Overnight / Rest |
| 12:00 PM PST (Midday / Noon) | 5:00 AM JST (+1 day) | +1 day | 4:00 AM JST (+1 day) | Overnight / Rest |
| 3:00 PM PST (Afternoon) | 8:00 AM JST (+1 day) | +1 day | 7:00 AM JST (+1 day) | Shoulder Hours |
| 6:00 PM PST (Evening Wrap-up) | 11:00 AM JST (+1 day) | +1 day | 10:00 AM JST (+1 day) | Shoulder Hours |
| Seattle (PST) | Tokyo (Winter (PST → JST)) | Day (Tokyo) | Tokyo (Summer (PDT → JST)) | Availability (Seattle ↔ Tokyo) |
|---|---|---|---|---|
| 12:00 AM PST in Seattle | 5:00 PM JST in Tokyo | Same day | 4:00 PM JST | Seattle–Tokyo Overnight |
| 1:00 AM PST in Seattle | 6:00 PM JST in Tokyo | Same day | 5:00 PM JST | Seattle–Tokyo Overnight |
| 2:00 AM PST in Seattle | 7:00 PM JST in Tokyo | Same day | 6:00 PM JST | Seattle–Tokyo Overnight |
| 3:00 AM PST in Seattle | 8:00 PM JST in Tokyo | Same day | 7:00 PM JST | Seattle–Tokyo Overnight |
| 4:00 AM PST in Seattle | 9:00 PM JST in Tokyo | Same day | 8:00 PM JST | Seattle–Tokyo Overnight |
| 5:00 AM PST in Seattle | 10:00 PM JST in Tokyo | Same day | 9:00 PM JST | Seattle–Tokyo Overnight |
| 6:00 AM PST in Seattle | 11:00 PM JST in Tokyo | Same day | 10:00 PM JST | Seattle–Tokyo Overnight |
| 7:00 AM PST in Seattle | 12:00 AM JST in Tokyo | +1 day | 11:00 PM JST | Seattle–Tokyo Overnight |
| 8:00 AM PST in Seattle | 1:00 AM JST in Tokyo | +1 day | 12:00 AM JST (+1 day) | Seattle–Tokyo Overnight |
| 9:00 AM PST in Seattle | 2:00 AM JST in Tokyo | +1 day | 1:00 AM JST (+1 day) | Seattle–Tokyo Overnight |
| 10:00 AM PST in Seattle | 3:00 AM JST in Tokyo | +1 day | 2:00 AM JST (+1 day) | Seattle–Tokyo Overnight |
| 11:00 AM PST in Seattle | 4:00 AM JST in Tokyo | +1 day | 3:00 AM JST (+1 day) | Seattle–Tokyo Overnight |
| 12:00 PM PST in Seattle | 5:00 AM JST in Tokyo | +1 day | 4:00 AM JST (+1 day) | Seattle–Tokyo Overnight |
| 1:00 PM PST in Seattle | 6:00 AM JST in Tokyo | +1 day | 5:00 AM JST (+1 day) | Seattle–Tokyo Overnight |
| 2:00 PM PST in Seattle | 7:00 AM JST in Tokyo | +1 day | 6:00 AM JST (+1 day) | Seattle–Tokyo Shoulder |
| 3:00 PM PST in Seattle | 8:00 AM JST in Tokyo | +1 day | 7:00 AM JST (+1 day) | Seattle–Tokyo Shoulder |
| 4:00 PM PST in Seattle | 9:00 AM JST in Tokyo | +1 day | 8:00 AM JST (+1 day) | Seattle–Tokyo 9–5 |
| 5:00 PM PST in Seattle | 10:00 AM JST in Tokyo | +1 day | 9:00 AM JST (+1 day) | Seattle–Tokyo Shoulder |
| 6:00 PM PST in Seattle | 11:00 AM JST in Tokyo | +1 day | 10:00 AM JST (+1 day) | Seattle–Tokyo Shoulder |
| 7:00 PM PST in Seattle | 12:00 PM JST in Tokyo | +1 day | 11:00 AM JST (+1 day) | Seattle–Tokyo Shoulder |
| 8:00 PM PST in Seattle | 1:00 PM JST in Tokyo | +1 day | 12:00 PM JST (+1 day) | Seattle–Tokyo Shoulder |
| 9:00 PM PST in Seattle | 2:00 PM JST in Tokyo | +1 day | 1:00 PM JST (+1 day) | Seattle–Tokyo Late evening / night |
| 10:00 PM PST in Seattle | 3:00 PM JST in Tokyo | +1 day | 2:00 PM JST (+1 day) | Seattle–Tokyo Late evening / night |
| 11:00 PM PST in Seattle | 4:00 PM JST in Tokyo | +1 day | 3:00 PM JST (+1 day) | Seattle–Tokyo Late evening / night |
Between Seattle (United States, America/Los_Angeles) and Tokyo (Japan, Asia/Tokyo), the seasonal offset shifts by 1 hour. In winter standard time (PST vs. JST), Tokyo (UTC+9) is 17 hours ahead of Seattle (UTC-8). In summer (PDT vs. JST), Tokyo (UTC+9) is 16 hours ahead of Seattle (UTC-7).
No Daylight Saving Time observed. Remains on JST (UTC+9) year-round.
| Date Window | Duration | Active Zones | Time Difference | Regime |
|---|---|---|---|---|
| Since Nov 1, 2026 | 133 days | PST (UTC-8) → JST (UTC+9) | 17 hours | Standard Alignment (Active Now) |
| Mar 14, 2027 – Nov 2, 2027 | 233 days | PDT (UTC-7) → JST (UTC+9) | 16 hours | Standard Alignment |
Because Tokyo is 17 hours ahead in winter and 16 hours ahead in summer, Tokyo enters the next calendar day (+1 day) at 7:00 AM PST in winter and 8:00 AM PDT in summer in Seattle. Before that cutoff, both locations share the same weekday; from 7:00 AM PST (8:00 AM PDT in summer) until midnight in Seattle, Mon–Fri in Seattle maps to Tue–Sat in Tokyo.
Weekend & Workday Alignment: Friday afternoon/evening in Seattle (any slot at or after 7:00 AM PST / 8:00 AM PDT in summer) lands on Saturday morning/afternoon in Tokyo—which is Tokyo's weekend (Sat–Sun). Conversely, Monday morning in Tokyo (before 5:00 PM JST) is still Sunday in Seattle (Seattle's Sat–Sun weekend). For late-day Seattle / morning Tokyo syncs, book Monday–Thursday in Seattle (Tuesday–Friday in Tokyo).
Geographically, Seattle (United States, 47.61°N, 122.33°W, IATA: SEA) and Tokyo (Japan, 35.68°N, 139.65°E, IATA: HND/NRT) are separated by a great-circle distance of 7,700 km (4,785 miles, approximately 9.5h non-stop flight). By longitude, true solar time in Tokyo is 17 hours and 28 minutes ahead of Seattle (a 28-minute divergence from the 17 hours standard civil clock offset): Seattle (47.61°N, 122.33°W) sits 2.33° west of the 120.0°W PST reference meridian, so mean solar noon occurs at 12:09 PM PST in winter and 1:09 PM PDT in summer, while Tokyo (35.68°N, 139.65°E) sits 4.65° east of the 135.0°E JST reference meridian, so mean solar noon occurs at 11:41 AM JST year-round.
In winter (standard time), Tokyo (JST, UTC+9) is 17 hours ahead of Seattle (PST, UTC-8). In summer (daylight saving time), Tokyo (JST, UTC+9) is 16 hours ahead of Seattle (PDT, UTC-7).
Yes — 4:00 PM in Seattle converts to 9:00 AM JST (+1 day) in winter and 8:00 AM JST (+1 day) in summer in Tokyo.
In winter (PST), the best window is 4:00 PM – 7:00 PM PST in Seattle (9:00 AM – 12:00 PM JST (+1 day) in Tokyo). In summer (PDT), use 4:30 PM – 7:30 PM PDT in Seattle (8:30 AM – 11:30 AM JST (+1 day) in Tokyo). Avoid hours outside 7:00 AM – 9:00 PM local time (9:00 PM – 2:00 PM PST (+1 day) in winter; 9:00 PM – 3:00 PM PDT (+1 day) in summer).
Seattle: Sun, Mar 14, 2027 (PST → PDT, new gap: 16 hours (PDT UTC-7 vs JST UTC+9)). Tokyo: No DST (JST year-round).
In winter (PST), 9:00 AM Seattle is 2:00 AM JST (+1 day) and 12:00 PM is 5:00 AM JST (+1 day) in Tokyo. In summer (PDT), 9:00 AM is 1:00 AM JST (+1 day) and 12:00 PM is 4:00 AM JST (+1 day).