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 RockTokyoMatch
Workday in Tokyo
Workday in Tokyo
Workday in Tokyo
Off hours
Off hours
Off hours
Off hours
Off hours
Off hours
+1 dayWorkday in Castle Rock
+1 dayWorkday in Castle Rock
+1 dayWorkday in Castle Rock
+1 dayWorkday in Castle Rock
+1 dayWorkday in Castle Rock
+1 dayWorkday in Castle Rock
+1 dayWorkday in Castle Rock
+1 dayWorkday in Castle Rock
+1 dayWorkday in Castle Rock
+1 dayWorkday in Tokyo
+1 dayWorkday in Tokyo
+1 dayWorkday in Tokyo
+1 dayWorkday in Tokyo
+1 dayWorkday in Tokyo
+1 dayWorkday 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.