This is the 893rd most frequent Japanese word.
回転
Rotation; revolution.
The word '回転' is used to describe the rotating motion of an object, in this case, the Ferris wheel in the amusement park.
この遊園地には、毎分回転する観覧車があります。
This amusement park has a Ferris wheel that rotates every minute.
Here, '回転' is used metaphorically to describe the speed of someone's thought processes, illustrating quick mental agility.
彼の考えの回転はとても速いので、議論で勝つのは難しいです。
His thinking rotation is so fast that it's hard to win an argument against him.
In this example, '回転' refers to the specific setting of a conveyor belt (rotating sushi) restaurant, emphasizing the physical rotation of the platform.