Winter Olympics setting in 1972, 1998, 2018 and 2022

ASIA

Think of the continent where Sapporo, Nagano, Pyeongchang, and Beijing are all located.

The Winter Olympics were held in Asia during the years listed: 1972 (Sapporo, Japan), 1998 (Nagano, Japan), 2018 (Pyeongchang, South Korea), and 2022 (Beijing, China). Since all these host cities are in Asia, the answer is the continent itself. The clue points to the shared geographic region rather than a specific city or country.