First of all,YAMADA Taro's statue is in Furu machi,Nigata city,and this statue is just swing a bat.
(pic from http://niigata-repo.com/wp-content/uploads/2014/01/IMGP6168.jpg)
So taking pics just in front of this,girls look like they are spanked by him in the street..
twitter's hashtag,youtube channel ,and official site(tumblr) would be useful to know more!