During their stay in Edo, 8 members left the group; Sadajiro TANAKA (lord chamberlain, 150 koku, due to causing a drunken frenzy), Shozaemon OYAMADA (100 koku, due to running away after stealing money from Gengozaemon KATAOKA), Seiemon NAKAMURA (lord chamberlain, 100 look, unknown reason), 鈴田十八 (reason unknown), Riheiji NAKATA (30 koku 4李施, reason unknown), Koheita MORI (onando (in charge of storage room), 20 koku with salary for 5 servants, reason unknown), Magozaemon SEO (retainer of the Oishi family, reason unknown) and Isuke YANO (foot soldier, 5 koku with salary for 2 servants, reason unknown).
江戸潜伏中にも同志の脱盟があり、田中貞四郎（側用人150石。酒乱をおこして脱盟。）、小山田庄左衛門（100石。片岡源五右衛門から金を盗んで逃亡）、中村清右衛門（側用人100石。理由不明）鈴田十八（理由不明）、中田理平次（30石4李施。理由不明）、毛利小平太（大納戸役20石5人扶持。理由不明）、瀬尾孫左衛門（大石家家臣。理由不明）、矢野伊助（足軽5石2人扶持。理由不明）の8名が姿を消した。