How many times has japan hosted the summer or winter Olympics games?

Answer 1

Japan has hosted one Summer Games and two Winter Games.

Tokyo hosted the Summer Games of 1964.
Sapporo hosted the Winter Games of 1972.
And Nagano hosted the Winter Games of 1998.

Notably, Japan had been chosen to host a few more games. Both Tokyo and Sapporo were supposed to host games in 1940, but that was before they went on a wartime footing--the games were originally moved then called off altogether because too much of the world was involved in World War II.

Answer 2

Summer Games: Tokyo, 1964. Winter Games, twice -- Nagano, 1998, and Sapporo, 1972.

Answer 3

3 times:

1964 Summer Olympics in Tokyo

1972 Winter Olympics in Sapporo

1998 Winter Olympics in Nagano