San Francisco ↔ Tokyo
Best Time to Call
Excellent overlap! The best window to call is between 16:00 and 17:00 (San Francisco time).
Sync San Francisco and Tokyo easily. San Francisco is 17 hours behind Tokyo. Excellent overlap! The best window to call is between 16:00 and 17:00 (San Francisco time).
Upcoming Time Change
- New York City clocks forward 1h in 11 days Mar 08
💡 Review recurring meetings scheduled during these dates to avoid sync issues.
Meeting Optimizer
Sync Score
3.3/10
-12h Current Time +12h
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Tokyo
13:43 GMT+9
Working
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New York City
23:43 EST
Sleeping
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London
04:43 GMT
Sleeping
Synchronization Context
Operating on opposite sides of the clock, these cities have virtually no overlapping business hours. Expect a 24-hour turnaround for most communications.
San Francisco Business Pulse
- Culture Innovation-focused and casual. Values disruption, speed, and technical excellence.
- Lunch Break 12:30 PM - 1:30 PM.
- Pro Tip Best reached between 10:00 AM and 4:00 PM. Expect a casual, tech-first vibe—informal language and dress are the norm. However, technical competence and speed are non-negotiable. Many in the Bay Area work non-traditional hours, but standard business times remain the safest bet.
Tokyo Business Pulse
- Culture Consensus-based and very formal. Respect for hierarchy and "Meishi Kōkan" (business card exchange) are central.
- Lunch Break Strictly 12:00 PM - 1:00 PM.
- Pro Tip The most effective window is 10:00 AM to 11:30 AM. Avoid the strictly observed 12-1 PM lunch hour at all costs. Late afternoon calls (4 PM - 5:30 PM) are also acceptable, but ensure you follow formal protocols and hierarchy if multiple stakeholders are on the line.
Quick Comparison
| Feature | San Francisco | Tokyo |
|---|---|---|
| Timezone | America/Los_Angeles | Asia/Tokyo |
| Country | USA | Japan |
| Coordinates | 37.77, -122.42 | 35.68, 139.65 |
| Population | 3,318,000 | 37,274,000 |