He studied Jodaiyo (Japanese calligraphy style during the middle of the Heian period) of ONO no Tofu and FUJIWARA no Yukinari, he then added Cho Sokushi's style to it, and created a new style called the Sonen Style or Sonen Shoren-in style of calligraphy.
小野道風・藤原行成の上代様の書法を研究、それに南宋の張即之の書風を加味し、尊円流または尊円流青蓮院流と称される書法を作り出した。