Best time to call Buenos Aires from Tokyo
There is no 9-to-5 overlap between these cities. Best compromise: 7 AM–10 AM in Tokyo (7 PM–10 PM the previous day in Buenos Aires), both sides are at least awake (7 AM–10 PM). Buenos Aires is 12 hours behind Tokyo. (as of July 2026, recalculated live in your browser.)
Live from your device clock via the IANA time-zone database built into your browser.
Hour-by-hour overlap
Both 9 AM–5 PM Both awake (7 AM–10 PM) One side asleep
| Tokyo | Buenos Aires | Call quality |
|---|---|---|
| 12 AM | 12 PM −1 day | Too early / too late |
| 1 AM | 1 PM −1 day | Too early / too late |
| 2 AM | 2 PM −1 day | Too early / too late |
| 3 AM | 3 PM −1 day | Too early / too late |
| 4 AM | 4 PM −1 day | Too early / too late |
| 5 AM | 5 PM −1 day | Too early / too late |
| 6 AM | 6 PM −1 day | Too early / too late |
| 7 AM | 7 PM −1 day | One side off-hours |
| 8 AM | 8 PM −1 day | One side off-hours |
| 9 AM | 9 PM −1 day | One side off-hours |
| 10 AM | 10 PM −1 day | Too early / too late |
| 11 AM | 11 PM −1 day | Too early / too late |
| 12 PM | 12 AM | Too early / too late |
| 1 PM | 1 AM | Too early / too late |
| 2 PM | 2 AM | Too early / too late |
| 3 PM | 3 AM | Too early / too late |
| 4 PM | 4 AM | Too early / too late |
| 5 PM | 5 AM | Too early / too late |
| 6 PM | 6 AM | Too early / too late |
| 7 PM | 7 AM | One side off-hours |
| 8 PM | 8 AM | One side off-hours |
| 9 PM | 9 AM | One side off-hours |
| 10 PM | 10 AM | Too early / too late |
| 11 PM | 11 AM | Too early / too late |
Grid prerendered July 2026 and recomputed in your browser on load, so daylight-saving switches are always reflected. Neither city observes daylight saving time, so the difference stays the same all year.
Frequently asked questions
How many hours ahead is Buenos Aires of Tokyo?
Buenos Aires is 12 hours behind Tokyo. (Checked July 2026; where daylight saving applies, the gap can shift by an hour part of the year, the page recalculates live.)
What time is 9 AM in Tokyo in Buenos Aires?
9 AM in Tokyo is 9 PM the previous day in Buenos Aires.
Do Tokyo and Buenos Aires change clocks for daylight saving?
Neither city observes daylight saving time, so the difference stays the same all year.
Which hours work for a call?
There is no 9-to-5 overlap between these cities. Best compromise: 7 AM–10 AM in Tokyo (7 PM–10 PM the previous day in Buenos Aires), both sides are at least awake (7 AM–10 PM).