the Morning Musume. Museum will continue on at the HMV Sendai E BeanS store in Sendai, Miyagi prefecture from March 11th to April 15th.
As a exclusive, the outfits that Morning Musume. 18 wore on the 15th will be up on display from 3/11~3/18.
http://www.hmv.co.jp/en/news/article/1802070051/