Kaikei was very close the monk, Shunjobo-Chogen, who was the Daikanjin (chief person in charge) during the restoration of Daibutsu (Big Buddha) of Todai-ji Temple.
快慶は東大寺大仏再興の大勧進（総責任者）であった俊乗坊重源（しゅんじょうぼうちょうげん）と関係が深かった。