No overlap — one side will join outside working hours
BRT (São Paulo)
JST (Tokyo)
00:00
12:00Working
01:00
13:00Working
02:00
14:00Working
03:00
15:00Working
04:00
16:00Working
05:00
17:00
06:00
18:00
07:00
19:00
08:00
20:00
09:00Working
21:00off
10:00Working
22:00off
11:00Working
23:00off
12:00Working
00:00+1doff
13:00Working
01:00+1doff
14:00Working
02:00+1doff
15:00Working
03:00+1doff
16:00Working
04:00+1doff
17:00
05:00+1d
18:00
06:00+1d
19:00
07:00+1d
20:00
08:00+1d
21:00
09:00+1dWorking
22:00
10:00+1dWorking
23:00
11:00+1dWorking
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between brt and jst?
Brasilia Time (brt) is UTC-3 and Japan Standard Time (jst) is UTC+9. The difference between them is 12 hours.
Where is brt used?
Brasilia Time (brt) is used in Brazil and surrounding regions. The IANA timezone identifier is America/Sao_Paulo.
Where is jst used?
Japan Standard Time (jst) is used in Japan and surrounding regions. The IANA timezone identifier is Asia/Tokyo.
How do I convert brt to jst?
Use the interactive converter above. Drag the time slider to any brt time and the jst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
BRT (São Paulo) to JST (Tokyo) — exact time difference
BRT (São Paulo) is 12 hours behind JST (Tokyo). When it's noon in BRT (São Paulo), it's 00:00 in JST (Tokyo).
BRT (São Paulo) observes America/Sao_Paulo and JST (Tokyo) observes Asia/Tokyo — a 12 hours gap between them.
Working hours overlap
When BRT (São Paulo) is in standard working hours, JST (Tokyo) is not — and vice versa. There is no mutual business window between these two locations.
Meeting time recommendations
No business hours overlap exists between BRT (São Paulo) and JST (Tokyo). Showing the most balanced options with minimal inconvenience for both locations.
04:00 São Paulo / 16:00 Tokyo⚡ One side off-hours
⚠️ 5h before working hours in São Paulo
09:00 São Paulo / 21:00 Tokyo⚡ One side off-hours
⚠️ 5h after working hours in Tokyo
16:00 São Paulo / 04:00 Tokyo⚡ One side off-hours
⚠️ 5h before working hours in Tokyo
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Public holidays this year
⚡ Upcoming holidays in both locations, confirm with your contact before booking.
BRT (São Paulo)7 holidays
Jul 9Constitutionalist Revolution of 1932
Sep 7Independence Day
Oct 12Our Lady of Aparecida
Nov 2All Souls' Day
Nov 15Republic Proclamation Day
JST (Tokyo)7 holidays
Jul 20Marine Day
Aug 11Mountain Day
Sep 21Respect for the Aged Day
Sep 23Autumnal Equinox Day
Oct 12Sports Day
BRT (São Paulo) and JST (Tokyo) — practical scheduling
Working across BRT (São Paulo) (Brazil) and JST (Tokyo) (Japan) is a challenge — the 12-hour difference means no shared business hours window under a standard schedule. Flexibility from at least one side is required.
💡 Practical scheduling guidelines
⚡
04:00–05:00 in BRT (São Paulo) corresponds to 16:00–17:00 in JST (Tokyo) (5h before working hours in São Paulo).
⚡
09:00–10:00 in BRT (São Paulo) corresponds to 21:00–22:00 in JST (Tokyo) (5h after working hours in Tokyo).
⚡
16:00–17:00 in BRT (São Paulo) corresponds to 04:00–05:00 in JST (Tokyo) (5h before working hours in Tokyo).
With no shared business hours, these slots distribute the scheduling burden as evenly as possible between both locations.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Drag the slider at the top to convert any BRT (São Paulo) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
