Complex sentence: This is called "awa odori" which means a bubble dance and its form of eroticism is considered to be of the highest quality and thus soapland costs the most among various types of Japanese brothels.
Split into simpler sentences: This is called "awa odori" which means a bubble dance and its form of eroticism is considered to be of the highest quality. This causes soapland to cost the most among various types of Japanese brothels.