Osaka to Chicago
-14hOsaka
JSTSOURCEChicago
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and CDT on the World Map
The map below highlights the JST (Japan Standard Time) and CDT (Central Standard Time) timezone regions across the globe.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •CST covers 20 US states fully or partially.
- •Chicago and Houston are the two largest cities in the Central Time Zone.
- •Mexico City, one of the world's most populous cities, operates on CST.
- •CST is 1 hour behind EST and 2 hours ahead of PST.
About Osaka
WikipediaOsaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.
Osaka Castle was originally built in 1583 and has been rebuilt several times.
About Chicago
WikipediaChicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
The Chicago Board of Trade is the world's oldest futures and options exchange.
Everything You Need to Know About Osaka and Chicago Time
Osaka runs on Japan Standard Time (JST) at UTC+09:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts Osaka 14 hours behind Chicago — a difference of -14h at the current offsets.
In practice, when it is 9:00 AM in Osaka it is 7:00 PM in Chicago on the previous day. Midnight in Osaka is 10:00 AM in Chicago.Chicago observes daylight saving time while Osaka does not, so the gap narrows or widens by an hour part of the year.
Osaka to Chicago time conversion table
| Osaka (JST) | Chicago (CDT) | Day |
|---|---|---|
| 12:00 AM | 10:00 AM | previous day |
| 6:00 AM | 4:00 PM | previous day |
| 7:00 AM | 5:00 PM | previous day |
| 8:00 AM | 6:00 PM | previous day |
| 9:00 AM | 7:00 PM | previous day |
| 12:00 PM | 10:00 PM | previous day |
| 3:00 PM | 1:00 AM | same day |
| 5:00 PM | 3:00 AM | same day |
| 6:00 PM | 4:00 AM | same day |
| 9:00 PM | 7:00 AM | same day |
Why people convert Osaka to Chicago time
- Scheduling a call from Osaka to Chicago: a 10:00 AM start in Osaka lands at 8:00 PM in Chicago the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -14h gap: Osaka and Chicago have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Chicago is 7:00 PM in Osaka.
- Keeping family and friends in sync: knowing that 8:00 PM in Osaka is 6:00 AM in Chicago makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -14h gap is not.
- With a -14h gap there is no shared 9-to-5 window, so alternate the early start: one week Osaka takes the early slot, the next week Chicago does.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
About CST (Central Standard Time)
Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.
Best time to call between Osaka and Chicago
With a -14h offset there is no overlap inside a normal 9 AM – 5 PM day. Chicago opens at 9:00 AM CDT, which is 7:00 PM in Osaka, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Osaka and Chicago have no shared working hours because of the -14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Osaka is 14 hours behind Chicago (JST UTC+09:00 → CDT UTC-05:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Osaka
Does not observe DST
Chicago
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Osaka and Chicago?
Osaka (JST, UTC+09:00) is 14 hours behind Chicago (CDT, UTC-05:00). The gap is currently -14h.
How do I convert Osaka time to Chicago time?
Add -14h to Osaka local time. For example, 9:00 AM in Osaka is 7:00 PM in Chicago (previous day).
What time is it in Chicago right now?
Chicago uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -14h offset from Osaka.
What is the best time to call Chicago from Osaka?
There is no shared working-hours window because of the -14h gap. The closest option is 1:00 PM in Osaka, which is 11:00 PM in Chicago.
Which is behind, Osaka or Chicago?
Osaka is 14 hours behind Chicago. When it is 12:00 PM in Osaka it is 10:00 PM in Chicago.
Do Osaka and Chicago use different time zones?
Osaka (Japan) uses JST at UTC+09:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are Asia/Tokyo and America/Chicago.
Does daylight saving time affect the Osaka–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and Osaka is not, so the -14h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Osaka's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, Osaka's zone?
JST is used in Japan.
Is there a day difference between Osaka and Chicago?
Sometimes. The -14h gap is large enough that 8:00 PM or later in Osaka already falls on the in Chicago.
What is the time difference between Osaka and Chicago?
Chicago is -14h from Osaka.
What timezone is Osaka in?
Osaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.
What timezone is Chicago in?
Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
What are the business hours in Osaka?
Standard business hours in Osaka are 9:00 AM - 6:00 PM JST.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
What is the best time to schedule a call between Osaka and Chicago?
The best overlap for a call is when both cities are in business hours. Osaka works 9:00 AM - 6:00 PM JST and Chicago works 8:00 AM - 5:00 PM CST (-14h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Osaka and Chicago?
Osaka uses JPY (¥) while Chicago uses USD ($). Check current exchange rates when planning travel or business between these cities.
How do Osaka and Chicago compare in size?
Osaka has a population of approximately 2.8 million (metro: 19 million), while Chicago has approximately 2.7 million (metro: 9.5 million).
What are the major landmarks in Osaka and Chicago?
Osaka is known for Osaka Castle, Dotonbori, Universal Studios Japan. Chicago is famous for Willis Tower, Millennium Park, Cloud Gate (The Bean).
Do Osaka and Chicago have stock exchanges?
Yes. Osaka has the OSE (Osaka Exchange - derivatives) and Chicago has the CME (Chicago Mercantile Exchange), CBOE. The -14h time difference affects trading hour overlaps between these exchanges.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in Osaka, what time is it in Chicago?
When it is 12:00 AM (midnight) in Osaka (JST), it is -14h later in Chicago (CST).
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