At present, however, it is questioned whether it is appropriate to simply equate the Way of Tea practiced by Soji with that of Rikyu only because he was a highly regarded disciple of Rikyu, and qualitative difference of the two by comparing the book with its contemporary materials on Rikyu has emerged as a new subject to be explored.
但し現在では、利休の高弟であることを理由に宗二の茶を利休のそれと安易に同一視してきたことへの疑念が持ち上がっており、利休関係の同時代資料との比較を基にした両者の質的差異の究明も課題となっている。