[かいかん, kaikan] (n, vs) (1) opening a hall for that day's business (museum, library, such like buildings); (2) opening of new hall (museum, etc.); (P)#3941
[おおぎり, oogiri] (n) (1) (大切り, 大切 only) large cut (e.g. of meat); (2) last piece of the day's programme; last act of a play; comic dialogue as the last item in vaudeville, music hall, etc.