KURAMOCHI Yuka,gravure idol or net idol, is spanked by her fans in an event to celebrate her new DVD.
Yuka says so in the movie below,and in this movie,she is spanked (by NOT her fun but a reporter ?) with a picopico Hammer.
Yuka is famous as a "Shiri syokunin"(lit. craftsperson of butt) or "Shiri doru",a compound word consisted of an oshiri(buttocks) and an doru(idol) in Japanese.
So she is often spanked or spanks others (on nico nama/niconico or so)...