Time Difference Between Castle Rock and Tokyo
Tokyo is 15 hours ahead Castle Rock.
United States
Castle Rock
America/Denver · UTC-6
Japan
Tokyo
Asia/Tokyo · UTC+9
Best Times to Meet
Hours where standard working time (9 AM – 6 PM) overlaps in both Castle Rock and Tokyo.
Standard working hours don't overlap between Castle Rock and Tokyo. Consider early-morning calls in Castle Rock or late-evening calls in Tokyo.
Castle Rock to Tokyo — 24-Hour Conversion
Each row shows the equivalent local time in Tokyo for an hour in Castle Rock. Working-hours rows (9–18) are highlighted.
| Castle Rock | Tokyo | Match |
|---|---|---|
| Workday in Tokyo | ||
| Workday in Tokyo | ||
| Workday in Tokyo | ||
| Off hours | ||
| Off hours | ||
| Off hours | ||
| Off hours | ||
| Off hours | ||
| Off hours | ||
| +1 day | Workday in Castle Rock | |
| +1 day | Workday in Castle Rock | |
| +1 day | Workday in Castle Rock | |
| +1 day | Workday in Castle Rock | |
| +1 day | Workday in Castle Rock | |
| +1 day | Workday in Castle Rock | |
| +1 day | Workday in Castle Rock | |
| +1 day | Workday in Castle Rock | |
| +1 day | Workday in Castle Rock | |
| +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 Castle Rock and Tokyo?
Tokyo, Japan (UTC+9) is 15 hours ahead Castle Rock, United States (UTC-6).
What is the best time to schedule a meeting between Castle Rock 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 Castle Rock 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 Castle Rock, what time is it in Tokyo?
Use the conversion table on this page — every hour in Castle Rock is mapped to its equivalent local time in Tokyo, including day shift markers when the date differs.