Kaiho Gyoson 海保漁村, a Japanese Confucian scholar and philologist in late Edo period, composed Emendation of Collating Notes on Zhouyi 周易校勘記舉正in the third year of the Kaei 嘉永 Era (1850). He used the Single-Commentary Edition of Zhouyi Zhengyi he collected to verify Collating Noteson Zhouyi composed by Ruan Yuan, a textual research scholar in late Qing Dynasty. Although Kaiho made some new findings in Emendation of Collating Notes on Zhouyi, he also made mistakes due to limitations of the master copy he relied on and reference books he selected. This article examines Kaiho's collation through comparing it with the Single-Commentary Edition, Eight-Line Edition (inscribed in Song Dynasty), Ten-Line Edition (inscribed in Yuan Dynasty), Fujian Edition, and Mao Edition (inscribed in the Ming Dynasty) of Zhouyi Zhengyi, while taking previous research results into consideration. This article attempts to gain a correct view of Kaiho's collation as well as explore the origin of the Single-Commentary Edition he used.