Also, it is known that "Oshima Hikki" (the notes of Oshima, 1776), which Yoshiteru TOBE, a Confucian scholar at Tosa Province, wrote based on interviews with Ryukyu warriors who had been washed up to Tosa, reads that Koshokun, a Chinese martial artist, showcased the techniques of the martial art called 'kumiai-jutsu' when visiting the Ryukyu Kingdom in the previous year.
また、土佐藩の儒学者・戸部良煕が、土佐に漂着した琉球士族より聴取して記した『大島筆記』(1776年）の中に、先年来琉した公相君が組合術という名の武術を披露したとの記述があることが知られている。