Time Difference Between Castro Valley and Tokyo
Tokyo is 16 hours ahead Castro Valley.
United States
Castro Valley
America/Los_Angeles · UTC-7
Japan
Tokyo
Asia/Tokyo · UTC+9
Best Times to Meet
Hours where standard working time (9 AM – 6 PM) overlaps in both Castro Valley and Tokyo.
Castro Valley
5:00 PM
Tokyo
9:00 AM
Castro Valley to Tokyo — 24-Hour Conversion
Each row shows the equivalent local time in Tokyo for an hour in Castro Valley. Working-hours rows (9–18) are highlighted.
| Castro Valley | Tokyo | Match |
|---|---|---|
| Workday in Tokyo | ||
| Workday in Tokyo | ||
| Off hours | ||
| Off hours | ||
| Off hours | ||
| Off hours | ||
| Off hours | ||
| Off hours | ||
| +1 day | Off hours | |
| +1 day | Workday in Castro Valley | |
| +1 day | Workday in Castro Valley | |
| +1 day | Workday in Castro Valley | |
| +1 day | Workday in Castro Valley | |
| +1 day | Workday in Castro Valley | |
| +1 day | Workday in Castro Valley | |
| +1 day | Workday in Castro Valley | |
| +1 day | Workday in Castro Valley | |
| +1 day | Best for meetings | |
| +1 day | Workday in Tokyo | |
| +1 day | Workday in Tokyo | |
| +1 day | Workday in Tokyo | |
| +1 day | Workday in Tokyo | |
| +1 day | Workday in Tokyo | |
| +1 day | Workday in Tokyo |
Frequently Asked Questions
What is the time difference between Castro Valley and Tokyo?
Tokyo, Japan (UTC+9) is 16 hours ahead Castro Valley, United States (UTC-7).
What is the best time to schedule a meeting between Castro Valley and Tokyo?
The best meeting times overlap when both cities are within standard working hours (9 AM – 6 PM). The full hour-by-hour table on this page lists every overlap window.
Does daylight saving time change the difference between Castro Valley and Tokyo?
Yes — when one city observes daylight saving time and the other does not, the gap shifts by an hour. The conversion table on this page reflects the current offset, including any active DST.
When it is 9 AM in Castro Valley, what time is it in Tokyo?
Use the conversion table on this page — every hour in Castro Valley is mapped to its equivalent local time in Tokyo, including day shift markers when the date differs.