YAZAWA Erika got spanked in "BANANA STEAK",july 29,2014.
There is the "Ketsu-bat sensyuken"(lit. Spanking with baseball bat Championship) in this episode.
In this competition,they got a single spanking with baseball bat in turn and must keep calm and not change their expression after they received swat.
http://v.youku.com/v_show/id_XNzQ4MTc5MjY4.html
This battle started in 17:00 or so and Erika's turn in 18:55.
By the way,Erika was scheduled to work as swimsuit model next day,but her manager said OK because they would not plan to take a picture of her bottom.