Futatsu chôchô kuruwa nikki (Diary of two butterflies in the pleasure quarters: 双蝶々曲輪日記) is a tale of two sumô wrestlers, Hanaregoma Chôkichi, and Nuregami Chôgorô (who appears on this sheet). [Note the pun in the play title, as both names include the character for chô, "butterfly."] The central theme involves an attempt to thwart the ransom of a courtesan named Azuma (sister of keisei Miyako) by the evil samurai Hiraoka Goemon (also Chôkichi's patron) in favor of Chôgorô's sponsor, Yogorô, whom Azuma loves. Yogorô bribes Chôgorô to throw a sumô match against Chôkichi in the hope of enlisting the latter's help in stopping Goemon, but even after being handed a false victory, Chôkichi refuses to violate his patron's wishes. Afterwards, however, in a scene in which Chôgorô prevents Chôkichi from committing seppuku (ritual suicide, lit., "incision of the abdomen": 切腹) over shame for falling into dissipation, the two wrestlers become "brothers," and then Chôkichi returns the favor by aiding Chôgorô in his escape after he murders four men trying to steal Azuma for Goemon.
Sadamasu has effectively captured the readiness, bulk, and power of the wrestler Chôgorô in his huge shoulders, bent upper torso, and determined stare (mie, 見得).
References: IKBYS-III, no. 127; NKE, p. 105