In addition, it has also been believed that he practiced Zen meditation when he was around 30 years old under the guidance of Sojun IKKYU, a monk of Daitoku-ji School of the Rinzai Sect, but some researchers are skeptical since no firm historical records that support such a view exist.
また30歳の頃臨済宗大徳寺派の一休宗純に参禅したという説がとられて来たが、これも確実な史料があるわけではなく、研究者の中には疑問視する声もある。