Osaka to Mumbai
-3h 30mOsaka
JSTSOURCEMumbai
ISTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and IST on the World Map
The map below highlights the JST (Japan Standard Time) and IST (India 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.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
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 Mumbai
WikipediaMumbai operates on India Standard Time (IST), UTC+5:30. As India's financial capital and home to BSE (Asia's oldest stock exchange), Mumbai timing is crucial for Asia markets.
The Mumbai local trains carry over 7.5 million passengers daily.
Osaka vs Mumbai: Offsets, DST and Best Call Times
Osaka runs on Japan Standard Time (JST) at UTC+09:00. Mumbai runs on India Standard Time (IST) at UTC+05:30. That puts Osaka 3 hours 30 minutes behind Mumbai — a difference of -3h 30m at the current offsets.
In practice, when it is 9:00 AM in Osaka it is 5:30 AM in Mumbai. Midnight in Osaka is 8:30 PM in Mumbai. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Osaka to Mumbai time conversion table
| Osaka (JST) | Mumbai (IST) | Day |
|---|---|---|
| 12:00 AM | 8:30 PM | previous day |
| 6:00 AM | 2:30 AM | same day |
| 7:00 AM | 3:30 AM | same day |
| 8:00 AM | 4:30 AM | same day |
| 9:00 AM | 5:30 AM | same day |
| 12:00 PM | 8:30 AM | same day |
| 3:00 PM | 11:30 AM | same day |
| 5:00 PM | 1:30 PM | same day |
| 6:00 PM | 2:30 PM | same day |
| 9:00 PM | 5:30 PM | same day |
Why people convert Osaka to Mumbai time
- Scheduling a call from Osaka to Mumbai: a 10:00 AM start in Osaka lands at 6:30 AM in Mumbai, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Osaka and Mumbai are inside the 9-to-5 working day between 12:30 PM and 5:00 PM JST time (9:00 AM–1:30 PM IST). That is roughly 4 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Osaka is 4:30 PM in Mumbai 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 -3h 30m gap is not.
- Block 12:30 PM–5:00 PM JST as the recurring meeting window if you work primarily from Osaka and need Mumbai colleagues present.
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 IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
Best time to call between Osaka and Mumbai
Both Osaka and Mumbai sit inside the 9 AM – 5 PM working day between 12:30 PM–5:00 PM JST, which is 9:00 AM–1:30 PM IST. That gives roughly 4 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Osaka and Mumbai overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
Osaka is 3 hours 30 minutes behind Mumbai (JST UTC+09:00 → IST UTC+05:30). The shared working window is 12:30 PM–5:00 PM JST. Remember to re-check around daylight-saving transitions.
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 Mumbai?
Osaka (JST, UTC+09:00) is 3 hours 30 minutes behind Mumbai (IST, UTC+05:30). The gap is currently -3h 30m.
How do I convert Osaka time to Mumbai time?
Add -3h 30m to Osaka local time. For example, 9:00 AM in Osaka is 5:30 AM in Mumbai.
What time is it in Mumbai right now?
Mumbai uses IST at UTC+05:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -3h 30m offset from Osaka.
What is the best time to call Mumbai from Osaka?
Call between 12:30 PM and 5:00 PM JST — that maps to 9:00 AM–1:30 PM IST and keeps both parties inside the working day.
Which is behind, Osaka or Mumbai?
Osaka is 3 hours 30 minutes behind Mumbai. When it is 12:00 PM in Osaka it is 8:30 AM in Mumbai.
Do Osaka and Mumbai use different time zones?
Osaka (Japan) uses JST at UTC+09:00, while Mumbai (India) uses IST at UTC+05:30. The IANA identifiers are Asia/Tokyo and Asia/Kolkata.
Does daylight saving time affect the Osaka–Mumbai difference?
Neither zone observes daylight saving time, so the -3h 30m offset between Osaka and Mumbai is fixed all year.
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 Mumbai?
Not normally. The -3h 30m gap only pushes the date over the previous day.
What is the time difference between Osaka and Mumbai?
Mumbai is -3h 30m 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 Mumbai in?
Mumbai operates on India Standard Time (IST), UTC+5:30. As India's financial capital and home to BSE (Asia's oldest stock exchange), Mumbai timing is crucial for Asia markets.
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 Mumbai?
Standard business hours in Mumbai are 9:30 AM - 5:30 PM IST.
What is the best time to schedule a call between Osaka and Mumbai?
The best overlap for a call is when both cities are in business hours. Osaka works 9:00 AM - 6:00 PM JST and Mumbai works 9:30 AM - 5:30 PM IST (-3h 30m difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Osaka and Mumbai?
Osaka uses JPY (¥) while Mumbai uses INR (₹). Check current exchange rates when planning travel or business between these cities.
How do Osaka and Mumbai compare in size?
Osaka has a population of approximately 2.8 million (metro: 19 million), while Mumbai has approximately 12.4 million (metro: 21.3 million).
What are the major landmarks in Osaka and Mumbai?
Osaka is known for Osaka Castle, Dotonbori, Universal Studios Japan. Mumbai is famous for Gateway of India, Chhatrapati Shivaji Terminus, Marine Drive.
Do Osaka and Mumbai have stock exchanges?
Yes. Osaka has the OSE (Osaka Exchange - derivatives) and Mumbai has the BSE (Bombay Stock Exchange), NSE. The -3h 30m 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 IST timezone?
Major cities in the IST timezone include Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad.
What is the UTC offset for IST?
India Standard Time (IST) is at UTC+05:30.
What should I know about the IST timezone?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
When is it midnight in Osaka, what time is it in Mumbai?
When it is 12:00 AM (midnight) in Osaka (JST), it is -3h 30m later in Mumbai (IST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More Osaka time conversions
- osaka to tokyo
- osaka to jst
- osaka to japan
- osaka to dubai
- osaka to delhi
- osaka to bangalore
- osaka to kathmandu
- osaka to bangkok
- osaka to singapore
- osaka to hong kong
- osaka to shanghai
- osaka to beijing
- osaka to seoul
- osaka to new york
- osaka to london
- osaka to sydney
- osaka to los angeles
- osaka to paris
- osaka to berlin
- osaka to toronto
- new york to osaka
- london to osaka
- dubai to osaka
- tokyo to osaka
- singapore to osaka
- sydney to osaka
- los angeles to osaka
- paris to osaka
- delhi to osaka
- mumbai to osaka
- berlin to osaka
- hong kong to osaka
- toronto to osaka
- kathmandu to osaka
See every conversion from Osaka →·See every conversion from Mumbai →