This is the ending theme for Haruhi Suzumiya. It has several characters from the anime dancing around. It also has a nice little song in the background.
On its own this anime theme song wouldn’t really stand out. However, it has a dance, which is actually done by a lot of people in Japan. As far as Japanese pop culture involving anime goes, this theme song is incredibly influential, and that’s what puts this at number eight on the list.