院本 is read as いんぽん (impon) and means drama.
いんぽん
impon
ほんいん
this institution
にほんがくしいん
Japan Academy
にほんきいん
Nihon Kiin (national go organization of Japan)
にほんげいじゅついん
Japan Art Academy
にほんせいしんかびょういんきょうかい
Japanese Association of Psychiatric Hospitals
にほんびじゅついん
Japan Art Institute
いんちょう
director (of a hospital, institution, academy, etc.)
いんせい
graduate student
ふるぼん
secondhand book
てほん
model handwriting
がんぽん
principal (invest.)
だいほん
script