Abstract
The Tiantai zhuwen leiji (_??__??__??__??__??__??_) is the collection of explanations of the classified Tiantai Doctrine which Ruji (_??__??_) edited in the middle of the Northern Song.
The Tiantai zhuwen leiji is an excellent source through which we can approach Song period Tiantai doctrine. However, since it represents an unsystematized state of the doctrine, its importance has not been heretofore appreciated. Here I study the background to the formation of the Tiantai zhuwen leiji, and discuss its influence on later Buddhism.
