Osaka to Vietnam
-2hOsaka
JSTSOURCEVietnam
ICTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and ICT on the World Map
The map below highlights the JST (Japan Standard Time) and ICT (Indochina 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.
ICT – Indochina Time
UTC+07:00Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.
- •Bangkok is one of the most visited cities in the world.
- •ICT is 12 hours ahead of EST.
- •Thailand, Vietnam, and Cambodia all share ICT.
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.
Osaka to Vietnam Time Difference – Complete Guide
Osaka runs on Japan Standard Time (JST) at UTC+09:00. Vietnam runs on Indochina Time (ICT) at UTC+07:00. That puts Osaka 2 hours behind Vietnam — a difference of -2h at the current offsets.
In practice, when it is 9:00 AM in Osaka it is 7:00 AM in Vietnam. Midnight in Osaka is 10:00 PM in Vietnam. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Osaka to Vietnam time conversion table
| Osaka (JST) | Vietnam (ICT) | Day |
|---|---|---|
| 12:00 AM | 10:00 PM | previous day |
| 6:00 AM | 4:00 AM | same day |
| 7:00 AM | 5:00 AM | same day |
| 8:00 AM | 6:00 AM | same day |
| 9:00 AM | 7:00 AM | same day |
| 12:00 PM | 10:00 AM | same day |
| 3:00 PM | 1:00 PM | same day |
| 5:00 PM | 3:00 PM | same day |
| 6:00 PM | 4:00 PM | same day |
| 9:00 PM | 7:00 PM | same day |
Why people convert Osaka to Vietnam time
- Scheduling a call from Osaka to Vietnam: a 10:00 AM start in Osaka lands at 8:00 AM in Vietnam, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Osaka and Vietnam are inside the 9-to-5 working day between 11:00 AM and 5:00 PM JST time (9:00 AM–3:00 PM ICT). That is roughly 6 hours of usable overlap.
- Watching a live event or market open: Osaka viewers need 7:00 AM in Vietnam to catch a 9:00 AM start there, and 2:00 AM if the event is anchored to Osaka.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -2h gap is not.
- Block 11:00 AM–5:00 PM JST as the recurring meeting window if you work primarily from Osaka and need Vietnam 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 ICT (Indochina Time)
Indochina Time (ICT) is used across Southeast Asia including Vietnam, Thailand, Laos, and Cambodia. Indonesia (Western time, WIB) also uses UTC+07:00. ICT does not observe daylight saving time.
Best time to call between Osaka and Vietnam
Both Osaka and Vietnam sit inside the 9 AM – 5 PM working day between 11:00 AM–5:00 PM JST, which is 9:00 AM–3:00 PM ICT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Osaka and Vietnam share 6 hours of working-hours overlap (11:00 AM–5:00 PM JST), so scheduling a live meeting is straightforward.
Osaka is 2 hours behind Vietnam (JST UTC+09:00 → ICT UTC+07:00). The shared working window is 11:00 AM–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 Vietnam?
Osaka (JST, UTC+09:00) is 2 hours behind Vietnam (ICT, UTC+07:00). The gap is currently -2h.
How do I convert Osaka time to Vietnam time?
Add -2h to Osaka local time. For example, 9:00 AM in Osaka is 7:00 AM in Vietnam.
What time is it in Vietnam right now?
Vietnam uses ICT at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h offset from Osaka.
What is the best time to call Vietnam from Osaka?
Call between 11:00 AM and 5:00 PM JST — that maps to 9:00 AM–3:00 PM ICT and keeps both parties inside the working day.
Which is behind, Osaka or Vietnam?
Osaka is 2 hours behind Vietnam. When it is 12:00 PM in Osaka it is 10:00 AM in Vietnam.
Do Osaka and Vietnam use different time zones?
Osaka (Japan) uses JST at UTC+09:00, while Vietnam (Vietnam) uses ICT at UTC+07:00. The IANA identifiers are Asia/Tokyo and Asia/Ho_Chi_Minh.
Does daylight saving time affect the Osaka–Vietnam difference?
Neither zone observes daylight saving time, so the -2h offset between Osaka and Vietnam 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 Vietnam?
Not normally. The -2h gap only pushes the date over the previous day.
What is the time difference between Osaka and Vietnam?
Vietnam is -2h 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 Vietnam in?
Vietnam operates on its local timezone.
What are the business hours in Osaka?
Standard business hours in Osaka are 9:00 AM - 6:00 PM JST.
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 ICT timezone?
Major cities in the ICT timezone include Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
What is the UTC offset for ICT?
Indochina Time (ICT) is at UTC+07:00.
What should I know about the ICT timezone?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
When is it midnight in Osaka, what time is it in Vietnam?
When it is 12:00 AM (midnight) in Osaka (JST), it is -2h later in Vietnam (ICT).
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