秘ひ宝ほう館かん

noun

adult museum; sex museum

A museum or exhibition space displaying sexually explicit artifacts, often found in older Japanese tourist spots. The term carries a somewhat dated or niche connotation.

• 熱あた海みの秘ひ宝ほう館かんは、かつて観かん光こう名めい所しょとして知しられていた。

  The Atami Sex Museum was once known as a tourist attraction.