In this paper, I consider the interpretation of the tetralemma 四句分別 in Jizang’s 吉蔵 Huayan youyi華厳遊意. In the Huayan youyi a total of 19 types of tetralemma are described, and in a total of 23 places the ideas of Jinajin 法朗, Jizang’s master, are also introduced. The logical structure of the traditional theory of the the Sanlun school 三論, based on the Buddhāvataṃsaka-sūtra 華厳経, penetrates the Huayan youyi, and the influence of the ideas of Jinajin is significant. Such a logical structure is rarely found in other works and it has become clear that this is a unique feature of the Huayan youyi.
