When the Buddhist statues in Hokuendo hall of Kofuku-ji Temple were completely reconstructed in 1212 by Unkei and other busshi of his school, Kosho was in charge of statue of Tamonten (Vaisravana), which is one of Shitenno (four guardian kings), but now the whereabouts of the statue of Shitenno is unknown (the statue of Shitenno enshrined at present in Hokuendo hall of Kofuku-ji Temple are different ones made in the early Heian period).
運慶が一門の仏師を率いて建暦2年（1212年）に完成させた興福寺北円堂復興造仏にあたっては、四天王のうちの多聞天像を担当しているが、この四天王像は現在、所在不明である（現在、興福寺北円堂に安置する四天王像は全く時代の違う平安時代初期のもの）。