There are different tubes for massage, such as air jets and whirlpools. Japanese tubs with large jets and Japanese whirlpools allow for a wide range of functions to improve blood circulation.
There are various types of Japanese tubs, such as air jets, whirlpools, and hot tubs in various sizes, shapes and styles. As a result, various tubs come with different functions, such as air jets, whirlpools, and even massage jets.