There is not a comprehensive biography of him yet; however, there is Tousui NAKARAI museum in Nakamura, Izuhara-machi, Tsushima-City, where it was believed to be his birthplace.
未だに本格的な伝記はないが、対馬市厳原町中村の生家跡とされる場所に半井桃水館がある。