Osaka to Chicago Time Difference
Chicago is 14 hours behind Osaka. When it's 10:33:46 PM in Osaka, it's 08:33:46 AM in Chicago.
How Many Hours Behind Is Chicago From Osaka?
Chicago is 14 hours behind Osaka. So Osaka is 14 hours ahead of Chicago looking the other way — the same gap, described from the other end.
In practice that means a working day in Osaka starts when it is already 7:00 PM the previous day in Chicago. 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 Osaka and Chicago
Standard 9-to-5 hours in Osaka and Chicago never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 12:00 PM in Osaka, which is 5:00 PM to 10:00 PM in Chicago.
both at work Osaka only Chicago only neither — hours shown along the strip are Osaka local time.
Convert a Specific Time
Pick any date and time in Osaka to see the exact equivalent in Chicago.
Common Times Converted
Osaka time on the left, Chicago time on the right.
Osaka to Chicago: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Osaka. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Osaka | Chicago | Working hours |
|---|---|---|
| 12:00 AM | 10:00 AM prev day | Chicago only |
| 1:00 AM | 11:00 AM prev day | Chicago only |
| 2:00 AM | 12:00 PM prev day | Chicago only |
| 3:00 AM | 1:00 PM prev day | Chicago only |
| 4:00 AM | 2:00 PM prev day | Chicago only |
| 5:00 AM | 3:00 PM prev day | Chicago only |
| 6:00 AM | 4:00 PM prev day | Chicago only |
| 7:00 AM | 5:00 PM prev day | — |
| 8:00 AM | 6:00 PM prev day | — |
| 9:00 AM | 7:00 PM prev day | Osaka only |
| 10:00 AM | 8:00 PM prev day | Osaka only |
| 11:00 AM | 9:00 PM prev day | Osaka only |
| 12:00 PM | 10:00 PM prev day | Osaka only |
| 1:00 PM | 11:00 PM prev day | Osaka only |
| 2:00 PM | 12:00 AM | Osaka only |
| 3:00 PM | 1:00 AM | Osaka only |
| 4:00 PM | 2:00 AM | Osaka only |
| 5:00 PM | 3:00 AM | — |
| 6:00 PM | 4:00 AM | — |
| 7:00 PM | 5:00 AM | — |
| 8:00 PM | 6:00 AM | — |
| 9:00 PM | 7:00 AM | — |
| 10:00 PM | 8:00 AM | — |
| 11:00 PM | 9:00 AM | Chicago only |
Understanding the Osaka – Chicago Time Difference
Osaka runs on Asia/Tokyo, currently JST (UTC+9:00). Chicago runs on America/Chicago, currently CDT (UTC-5:00). 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 Japan · Daylight Saving Time in the United States.
Osaka today
Chicago today
Frequently Asked Questions
What is the time difference between Osaka and Chicago?
Chicago is currently 14 hours behind Osaka. That gap becomes 15 hours on Sunday, November 1, 2026, when Chicago changes its clocks.
How many hours behind is Chicago from Osaka?
Chicago is 14 hours behind Osaka. Looking at it the other way, Osaka is 14 hours ahead of Chicago.
What time is it in Chicago when it is 9:00 AM in Osaka?
When it is 9:00 AM in Osaka, it is 7:00 PM the previous day in Chicago.
Is Chicago ahead of or behind Osaka?
Chicago is 14 hours behind Osaka. Osaka reaches each point in the day first, so Chicago is still getting started while the Osaka working day is finishing.
What is the best time to call between Osaka and Chicago?
Standard business hours in Osaka and Chicago do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 7:00 AM to 12:00 PM in Osaka, which is 5:00 PM to 10:00 PM in Chicago.
Does the time difference between Osaka and Chicago 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 Osaka and Chicago in?
Osaka uses the Asia/Tokyo time zone, currently JST (UTC+9:00). Chicago uses America/Chicago, currently CDT (UTC-5:00).