Chicago to Osaka Time Difference
Osaka is 14 hours ahead of Chicago. When it's 08:33:42 AM in Chicago, it's 10:33:42 PM in Osaka.
How Many Hours Ahead Is Osaka From Chicago?
Osaka is 14 hours ahead of Chicago. So Chicago is 14 hours behind Osaka looking the other way — the same gap, described from the other end.
In practice that means a working day in Chicago starts when it is already 11:00 PM in Osaka. The gap is not fixed all year: it becomes 15 hours on Sunday, November 1, 2026, when Chicago changes its clocks.
Best Time to Call Chicago and Osaka
Standard 9-to-5 hours in Chicago and Osaka never overlap, so someone has to take the call outside their working day. The most workable window is 5:00 PM to 10:00 PM in Chicago, which is 7:00 AM to 12:00 PM in Osaka.
both at work Chicago only Osaka only neither — hours shown along the strip are Chicago local time.
Convert a Specific Time
Pick any date and time in Chicago to see the exact equivalent in Osaka.
Common Times Converted
Chicago time on the left, Osaka time on the right.
Chicago to Osaka: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Chicago. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Chicago | Osaka | Working hours |
|---|---|---|
| 12:00 AM | 2:00 PM | Osaka only |
| 1:00 AM | 3:00 PM | Osaka only |
| 2:00 AM | 4:00 PM | Osaka only |
| 3:00 AM | 5:00 PM | — |
| 4:00 AM | 6:00 PM | — |
| 5:00 AM | 7:00 PM | — |
| 6:00 AM | 8:00 PM | — |
| 7:00 AM | 9:00 PM | — |
| 8:00 AM | 10:00 PM | — |
| 9:00 AM | 11:00 PM | Chicago only |
| 10:00 AM | 12:00 AM next day | Chicago only |
| 11:00 AM | 1:00 AM next day | Chicago only |
| 12:00 PM | 2:00 AM next day | Chicago only |
| 1:00 PM | 3:00 AM next day | Chicago only |
| 2:00 PM | 4:00 AM next day | Chicago only |
| 3:00 PM | 5:00 AM next day | Chicago only |
| 4:00 PM | 6:00 AM next day | Chicago only |
| 5:00 PM | 7:00 AM next day | — |
| 6:00 PM | 8:00 AM next day | — |
| 7:00 PM | 9:00 AM next day | Osaka only |
| 8:00 PM | 10:00 AM next day | Osaka only |
| 9:00 PM | 11:00 AM next day | Osaka only |
| 10:00 PM | 12:00 PM next day | Osaka only |
| 11:00 PM | 1:00 PM next day | Osaka only |
Understanding the Chicago – Osaka Time Difference
Chicago runs on America/Chicago, currently CDT (UTC-5:00). Osaka runs on Asia/Tokyo, currently JST (UTC+9:00). The gap of 14 hours is simply the distance between those two offsets.
Chicago observes Daylight Saving Time and Osaka does not, so the gap between them shifts by an hour twice a year. The next shift is on Sunday, November 1, 2026, when Chicago adjusts its clocks and the difference becomes 15 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in the United States · Daylight Saving Time in Japan.
Chicago today
Osaka today
Frequently Asked Questions
What is the time difference between Chicago and Osaka?
Osaka is currently 14 hours ahead of Chicago. That gap becomes 15 hours on Sunday, November 1, 2026, when Chicago changes its clocks.
How many hours ahead is Osaka from Chicago?
Osaka is 14 hours ahead of Chicago. Looking at it the other way, Chicago is 14 hours behind Osaka.
What time is it in Osaka when it is 9:00 AM in Chicago?
When it is 9:00 AM in Chicago, it is 11:00 PM in Osaka.
Is Osaka ahead of or behind Chicago?
Osaka is 14 hours ahead of Chicago. Osaka reaches each point in the day first, so its working day is already finishing while Chicago is still getting started.
What is the best time to call between Chicago and Osaka?
Standard business hours in Chicago and Osaka do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 5:00 PM to 10:00 PM in Chicago, which is 7:00 AM to 12:00 PM in Osaka.
Does the time difference between Chicago and Osaka change during the year?
Yes. Chicago observes Daylight Saving Time and Osaka does not, so the gap between them shifts during the year. It changes to 15 hours on Sunday, November 1, 2026.
What time zones are Chicago and Osaka in?
Chicago uses the America/Chicago time zone, currently CDT (UTC-5:00). Osaka uses Asia/Tokyo, currently JST (UTC+9:00).