Moreover, they learned that Tokube's wife Otatsu was a vassal of the Tamashima family, and thereby Danshichi and Tokube exchanged each other's yukata sleeves (light cotton kimono) to forge a bond of Gikyodai (to be associated with each other as brothers).
また、徳兵衛の女房のお辰が玉島家の家臣であったこともわかり、団七と徳兵衛は互いの浴衣の片袖を交わして義兄弟の契りを結ぶ。