Although some may consider these 'revelations' are very minor or totally insignificant, in Japanese society it is very important especially for teachers to be 'seen' as the 'example' and 'role model' so anything that goes against this picture can have a detrimental effect in someone's career... Also in general in Japan is all about appearances, things have to 'look' normal and everyone fitting in the society so any 'different' behavior again doesn't matter legal or not, is frowned upon and has consequences not only to the person but to their entire family!