In spite of the fact that Sumiyoshi was originally a kashi (lower class samurai), he cross-examined Hisaharu SHIMAZU in front of his brother, who was the lord of the domain, Tadayoshi SHIMAZU, and finally Hisaharu died in depression.
純義は下士の出身でありながら藩主島津忠義の面前で藩主の弟の島津久治を詰問し、結局久治は憂死している。