Kotsuki, Haruaki. <i>Bonbun Hokekyo Shahon (c4) Koteibon Neparu Girugitto Chuo Ajiakei Shahon Idoku Taisho =: A Critical Edition of Sanskrit Lotus Sutra C4 with Comparison Readings From Nepalese, Gilgit and Central Asian Manuscripts.</i> Tōkyō-to Shinjuku-ku: Sōka gakkai , 2023.