yes.
Because when flying either to Japan or America, you cross the International Date Line.
No.
In the path between Japan and Jamaica that does not cross the international date line, Japan is farther east.
You will cross the International Date Line when flying from Tokyo to Los Angeles. This means you will lose a day and arrive in Los Angeles on the same day you departed Tokyo.
When you cross the International Date Line from Japan to North America, you will subtract a day from the calendar. For example, if it is Monday in Japan, upon crossing the line, it will become Sunday in North America. This change occurs because the Date Line serves as the boundary where the date changes, effectively allowing travelers to "gain" a day when moving eastward.
In that direction, you turn your calendar ahead 24 hours when you cross the line.
It's not necessary, but that's the shortest way, and that's what all the airlines do.
1 day
how long dose it take to cross the international date
The International Date Line is the same for all nations.
They do.
No. The International Date Line does not go through China.