Fang HY, Qian Wenwen. Dystopian colors in Ryunosuke Wasagawa's Kappa[J]. Literary Education (I) 2022 (8) : 52-54.
Jiao QQ. On the ideological dilemma of Ryunosuke Wasagawa in "Kappa"[D]. Henan university, 2021.
Shi Y. On Egoism in the Works of Ryunosuke Wasagawa [J]. Young Writers, 2014(27):83.
Tong XM. Desperate Posthumous Work: Reading Ryunosuke Wasagawa's Kappa [J]. Journal of Yanbei Normal University, 1999(01):29-31+40.
Zhou Q. A Study on the Supremacy of Art and Human Nature: Centered on Ryunosuke Wasagawa's "Hell Changes" [J]. Popular Literature and Art,2015(07):35.
He J. From Hell to Jiekawa Ryunosuke's Art Supremacist[J]. Anhui Literature (Second Half), 2009(10):5-6.
Jie J, Looking at the creative ideas of Ryunosuke Wasagawa from the novel "Kappa" [J]. Journal of Heihe College,20,11(07):132-134.
Ding S, An Investigation of Ryunosuke Wasagawa's Kappa — Centered on Creative Techniques and Consciousness of Expression, [D]. Shanghai normal university, 2022.
Chen YK. On the influence of "Peach Blossom Source" on "Kappa" [J]. The influence of the literary education (below), 2023 (04) : 45-47.
Zhang JJ. The uneasiness of Ryunosuke Wasagawa in "Kappa"[D]. Shanghai International Studies University, 2019.
Chen Z. Analysis of "Kappa" in "Wildfire" "Cannibalism" Intention Analysis [J]. Journal of Lanzhou University of Education, 2016, 32 (11):16-17.