Tokyo to Buenos Aires
-12hTokyo
JSTSOURCEBuenos Aires
ARTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and ART on the World Map
The map below highlights the JST (Japan Standard Time) and ART (Argentina 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.
ART – Argentina Time
UTC-03:00Argentina Time (ART) is the standard time for Argentina, 3 hours behind UTC.
- •Argentina does not observe daylight saving time.
- •Buenos Aires is one of the most visited cities in South America.
- •ART is the same offset as BRT (UTC-03:00).
About Tokyo
WikipediaTokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.
The Tokyo subway system moves approximately 8.7 million passengers daily.
About Buenos Aires
WikipediaBuenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.
The Teatro Colón is considered one of the best opera houses in the world for acoustics.
Tokyo to Buenos Aires Time Difference – Complete Guide
Tokyo runs on Japan Standard Time (JST) at UTC+09:00. Buenos Aires runs on Argentina Standard Time (ART) at UTC-03:00. That puts Tokyo 12 hours behind Buenos Aires — a difference of -12h at the current offsets.
In practice, when it is 9:00 AM in Tokyo it is 9:00 PM in Buenos Aires on the previous day. Midnight in Tokyo is 12:00 PM in Buenos Aires. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Tokyo to Buenos Aires time conversion table
| Tokyo (JST) | Buenos Aires (ART) | Day |
|---|---|---|
| 12:00 AM | 12:00 PM | previous day |
| 6:00 AM | 6:00 PM | previous day |
| 7:00 AM | 7:00 PM | previous day |
| 8:00 AM | 8:00 PM | previous day |
| 9:00 AM | 9:00 PM | previous day |
| 12:00 PM | 12:00 AM | same day |
| 3:00 PM | 3:00 AM | same day |
| 5:00 PM | 5:00 AM | same day |
| 6:00 PM | 6:00 AM | same day |
| 9:00 PM | 9:00 AM | same day |
Why people convert Tokyo to Buenos Aires time
- Scheduling a call from Tokyo to Buenos Aires: a 10:00 AM start in Tokyo lands at 10:00 PM in Buenos Aires the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -12h gap: Tokyo and Buenos Aires 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 Buenos Aires is 9:00 PM in Tokyo.
- Watching a live event or market open: Tokyo viewers need 9:00 PM in Buenos Aires to catch a 9:00 AM start there, and 12:00 PM if the event is anchored to Tokyo.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -12h gap is not.
- With a -12h gap there is no shared 9-to-5 window, so alternate the early start: one week Tokyo takes the early slot, the next week Buenos Aires does.
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 ART (Argentina Time)
Argentina Time (ART) is the time zone used throughout Argentina. Argentina does not observe daylight saving time. ART shares the same offset as Brasilia Time (BRT) and Uruguay's UYT.
Best time to call between Tokyo and Buenos Aires
With a -12h offset there is no overlap inside a normal 9 AM – 5 PM day. Buenos Aires opens at 9:00 AM ART, which is 9:00 PM in Tokyo, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Tokyo and Buenos Aires have no shared working hours because of the -12h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Tokyo is 12 hours behind Buenos Aires (JST UTC+09:00 → ART UTC-03:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
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 Tokyo and Buenos Aires?
Tokyo (JST, UTC+09:00) is 12 hours behind Buenos Aires (ART, UTC-03:00). The gap is currently -12h.
How do I convert Tokyo time to Buenos Aires time?
Add -12h to Tokyo local time. For example, 9:00 AM in Tokyo is 9:00 PM in Buenos Aires (previous day).
What time is it in Buenos Aires right now?
Buenos Aires uses ART at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -12h offset from Tokyo.
What is the best time to call Buenos Aires from Tokyo?
There is no shared working-hours window because of the -12h gap. The closest option is 1:00 PM in Tokyo, which is 1:00 AM in Buenos Aires.
Which is behind, Tokyo or Buenos Aires?
Tokyo is 12 hours behind Buenos Aires. When it is 12:00 PM in Tokyo it is 12:00 AM in Buenos Aires.
Do Tokyo and Buenos Aires use different time zones?
Tokyo (Japan) uses JST at UTC+09:00, while Buenos Aires (Argentina) uses ART at UTC-03:00. The IANA identifiers are Asia/Tokyo and America/Buenos_Aires.
Does daylight saving time affect the Tokyo–Buenos Aires difference?
Neither zone observes daylight saving time, so the -12h offset between Tokyo and Buenos Aires is fixed all year.
Which other cities share Tokyo's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, Tokyo's zone?
JST is used in Japan.
Is there a day difference between Tokyo and Buenos Aires?
Sometimes. The -12h gap is large enough that 8:00 PM or later in Tokyo already falls on the in Buenos Aires.
What is the time difference between Tokyo and Buenos Aires?
Buenos Aires is -12h from Tokyo.
What timezone is Tokyo in?
Tokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.
What timezone is Buenos Aires in?
Buenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.
What are the business hours in Tokyo?
Standard business hours in Tokyo are 9:00 AM - 6:00 PM JST.
What are the business hours in Buenos Aires?
Standard business hours in Buenos Aires are 9:00 AM - 6:00 PM ART.
What is the best time to schedule a call between Tokyo and Buenos Aires?
The best overlap for a call is when both cities are in business hours. Tokyo works 9:00 AM - 6:00 PM JST and Buenos Aires works 9:00 AM - 6:00 PM ART (-12h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Tokyo and Buenos Aires?
Tokyo uses JPY (¥) while Buenos Aires uses ARS ($). Check current exchange rates when planning travel or business between these cities.
How do Tokyo and Buenos Aires compare in size?
Tokyo has a population of approximately 14 million (metro: 37.4 million), while Buenos Aires has approximately 3 million (metro: 15.4 million).
What are the major landmarks in Tokyo and Buenos Aires?
Tokyo is known for Tokyo Tower, Shibuya Crossing, Senso-ji Temple. Buenos Aires is famous for Casa Rosada, Teatro Colón, La Boca.
Do Tokyo and Buenos Aires have stock exchanges?
Yes. Tokyo has the TSE (Tokyo Stock Exchange) and Buenos Aires has the BCBA (Buenos Aires Stock Exchange). The -12h 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 ART timezone?
Major cities in the ART timezone include Buenos Aires, Córdoba, Rosario, Mendoza, La Plata, Tucumán.
What is the UTC offset for ART?
Argentina Time (ART) is at UTC-03:00.
What should I know about the ART timezone?
Argentina does not observe daylight saving time. Buenos Aires is one of the most visited cities in South America.
When is it midnight in Tokyo, what time is it in Buenos Aires?
When it is 12:00 AM (midnight) in Tokyo (JST), it is -12h later in Buenos Aires (ART).
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