The “Gorin Kuji Myo Himitsu Shaku Shuyoki or the Selected Exegesis on the Illuminating Secret Explication of the Five Chakras and the Nine Syllables” by Ryuyu (1773–1850) is the only exegesis of “Gorin Kuji Myo Himitsu Shaku,” the seminal work by Kogyo Daishi Kakuban (1095–1144). The original handwritten manuscript is published in the Chisan Repository (Chishaku-in Temple, Kyoto) and is registered as “Gorin Kuji Myo Himitsu Shaku Shuyoki.” It is mentioned in the “Chisan Repository Holding List” copy—comprising five scrolls and five books—on the bottom half of Page 239, Scroll 1. It is recorded in and published as Volume 5 of the “Chisan Zensho/Collected Works of the Chisan School.”
A reprint of this study, namely, Volume 85 (March 2000), has been contributed to the “Taisho Daigaku Kenkyu Kiyo/Memoirs of Taisho University” as Ryuyu’s “Selected Exegesis on the Illuminating Secret Explication of the Five Chakras and the Nine Syllables” – Study (1). Although subsequent reprints have been published since then, approximately three-fifth of the work remains incomplete. Based on these reprints, study (1) of Ryuyu’s “Selected Exegesis on the Illuminating Secret Explication of the Five Chakras and the Nine Syllables” was published in the 12th edition of “Treatises on Buddhist Cultural Theory” (Kawasaki Daishi Research Center, 2017). In addition, it has been published in Study (2) in the Chisan Gakuho Journal of Chisan Studies, Series 69 (Chisan-Kangaku-Kai, 2020); Study (3), in the Kawasaki Daishi Research Center Bulletin, No. 5 (Kawasaki Daishi Research Center, 2020); Study (4), in the same Kawasaki Daishi Research Center Bulletin, No. 6, (2021); and Study (5), in the Chisan Gakuho Journal of Chisan Studies, Series 70, (2021). Sources of transcription of Chinese classics (into Japanese), together with the reference materials, have been presented.
