開催

かいさい
Kaisai
Holding of an exhibition, conference, summit, or special sale, etc.

開催時, 開催日, 開催地
Kaisai ji, kaisai bi, kaisai ichi
Meeting time, day and place

開催中
Kaisaichuu
In session

開催中の展示案内
Kaisaichuu no tenji annai
Information on exhibition that is going on now