Many people find Japanese TV boring, silly or even annoying. The first time I saw a Japanese commercial (CM) was quite a culture shock. There is much more "action" and spontaneity in Japanese CM. The amusing factor makes it less annoying experience if you have to watch them slicing your favorite show or drama into pieces. Yup! You do see them often in TV, even much more then on Polish TV. However, the latter can rarely surprise you!
Check the video below a portion of adverts:)