City comparison · time difference and converter
São Paulo is 12 hours behind Kawasaki right now. Kawasaki sits in Japan on Tokyo; São Paulo sits in Brazil on Sao Paulo. They are roughly 18,550 km apart (11,526 mi), a flight of about 22h 49m. Kawasaki's metro holds around 1.5 million people; São Paulo's around 22.6 million.
Slot 1
00:00 / 12:00
Kawasaki / São Paulo
Partial overlapSlot 2
01:00 / 13:00
Kawasaki / São Paulo
Partial overlapSlot 3
02:00 / 14:00
Kawasaki / São Paulo
Partial overlapEach row is one hour in Kawasaki. Green rows are inside business hours in both cities; amber means only one side is at their desk; grey rows fall outside business hours in both.
No public holidays in Japan or Brazil this month.
Great-circle distance
18,550 km
(11,526 mi)
Approximate flight
22h 49m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
12h
Roughly 1 day to adjust per timezone crossed
The heatmap gives you the shape of the day. If you need to convert one specific hour — say a customer call or a release window — open the converter with both cities already loaded.
Open in converter →The difference between Kawasaki and São Paulo is not really a number, it's a daily rhythm. São Paulo is 12 hours behind Kawasaki on the clock today, but the lived version is that Kawasaki is ahead in the calendar, so by the time São Paulo comes online, half of Kawasaki's day is already gone. That gap, more than the raw offset, is what teams have to design around.
In Kawasaki, the working day picks up earliest in the financial districts — Kawasaki's downtown core wakes early and breaks for lunch at the usual hour. The mood in São Paulo is its own story: São Paulo settles into the evening at the usual hour, with the local commuter pattern setting the pace. If you are scheduling between the two, the heatmap above marks the rows where both patterns line up.
Daylight saving is the other thing to keep an eye on. Japan either observes DST or holds a fixed offset year-round; Brazil either follows its region's DST pattern or stays put all year. When the two changes are weeks apart, the offset between Kawasaki and São Paulo is one hour off the usual for that stretch — a cliff that catches recurring calendar invites unless your calendar app rebases them automatically. Pin the meeting to a city, not an offset, and the tool handles the rest.
For travellers, the 22h 49m flight is the short version of the story. The longer one is jet lag: roughly one day of adjustment per timezone crossed, which means a trip across the 12-hour gap costs about 12 groggy days on each side. Pilots and cabin crew swear by morning sunlight and an early walk; whatever your routine, the wall-clock numbers above are the source of truth for your first morning in the new city.