Live · calculated from the IANA time-zone database
Time difference between Tokyo and Buenos Aires
Short answer
Buenos Aires is 12 hours behind Tokyo. Right now it is 21:34 in Tokyo (GMT+9, UTC+9) and 09:34 in Buenos Aires (GMT-3, UTC−3).
Right now
Tokyo · Japan
21:34
Tuesday, September 15, 2026
Japan Standard Time · GMT+9 · UTC+9
Buenos Aires · Argentina
09:34
Tuesday, September 15, 2026
Argentina Standard Time · GMT-3 · UTC−3
Times at the moment this page was generated. Reload for a fresh reading.
Does the difference between Tokyo and Buenos Aires change during the year?
No. The difference is 12 hours for the whole of 2026: neither city observes daylight saving time.
Best time to call Buenos Aires from Tokyo (and vice versa)
With 12 hours between them there is no hour at which Tokyo and Buenos Aires are both inside a 9:00–17:00 working day. Teams split across these two cities usually alternate the sacrifice: one week the meeting lands early (7:00–8:00) in Buenos Aires and late (18:00–19:00) in the other city, the next week the other way round. The Timezone Matcher grid shades exactly those compromise hours.
Tokyo to Buenos Aires conversion table
Each Tokyo hour and its equivalent in Buenos Aires today. Rows shaded green are working hours (9:00–17:00) in both cities at once.
| Tokyo time · Tue, Sep 15 | Buenos Aires time |
|---|---|
| 00:00 | 12:00previous day |
| 01:00 | 13:00previous day |
| 02:00 | 14:00previous day |
| 03:00 | 15:00previous day |
| 04:00 | 16:00previous day |
| 05:00 | 17:00previous day |
| 06:00 | 18:00previous day |
| 07:00 | 19:00previous day |
| 08:00 | 20:00previous day |
| 09:00 | 21:00previous day |
| 10:00 | 22:00previous day |
| 11:00 | 23:00previous day |
| 12:00 | 00:00 |
| 13:00 | 01:00 |
| 14:00 | 02:00 |
| 15:00 | 03:00 |
| 16:00 | 04:00 |
| 17:00 | 05:00 |
| 18:00 | 06:00 |
| 19:00 | 07:00 |
| 20:00 | 08:00 |
| 21:00 | 09:00 |
| 22:00 | 10:00 |
| 23:00 | 11:00 |
Looking for it the other way round? This page covers both directions: Buenos Aires to Tokyo is the same difference with the sign flipped.
The two time zones
Tokyo — Asia/Tokyo
Tokyo keeps Japan Standard Time (JST), a fixed UTC+9 with no daylight saving. Japan and South Korea share the offset, so Tokyo and Seoul are always on the same clock.
Buenos Aires — America/Argentina/Buenos_Aires
Buenos Aires keeps Argentina Time, a fixed UTC−3 with no seasonal change, matching São Paulo and Montevideo all year.
Frequently asked questions
How many hours difference between Tokyo and Buenos Aires?
Buenos Aires is 12 hours behind Tokyo. The difference is the same all year: neither city changes its clocks.
When it is 12:00 noon in Tokyo, what time is it in Buenos Aires?
00:00 in Buenos Aires (at today's difference of 12 hours).
What is the best time for a meeting between Tokyo and Buenos Aires?
There is no overlap between the 9:00–17:00 working days of Tokyo and Buenos Aires. Teams usually alternate: an early-morning slot in Buenos Aires lands in the late evening of the other city.
Do Tokyo and Buenos Aires observe daylight saving time?
Tokyo: no. Buenos Aires: no. Neither changes, so the difference is fixed.
What time zone is Tokyo in? And Buenos Aires?
Tokyo: Japan Standard Time (Asia/Tokyo, UTC+9). Buenos Aires: Argentina Standard Time (America/Argentina/Buenos_Aires, UTC−3).
Tools
Meeting grid — add both cities and click a slot
Time zone converter — any city, any time
Working hours overlap calculator
Daylight saving time 2027 — all dates
More time differences from Tokyo
More time differences from Buenos Aires
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