J League: There are too many clubs in Kanagawa Prefecture. How many teams are there?
Once upon a time, the J League only had the J1 League. However, now there are J1 to J3, and the reality is that the number of teams has increased considerably. So, in which area are there most clubs? It's Kanagawa Prefecture. So, how many J clubs are there in Kanagawa Prefecture? And what is the reason behind this?