Hosono Masanobu et al., Kindai no bijinga: Meguro Gajoen Korekushon/Paintings of Modern Japanese Beauties at the Turn of the Century (Kyoto: Kyoto shoin, 1988), pl. 384.
Ryozo exhibited his portrait of Tokutomi Soho (1863-1957), the nationalist writer, in the 1943 sixth Shin-Bunten, a government- sponsored exhibition. See Nittenshi hensan iinkai (Nittenshi ed. staff), ed., Shin-Bunten hen 3 (Shin-Bunten vol. 3), vol. 15 of Nittenshi (History of Nitten [Japan Art Exhibition]) (Tokyo: Korinsha, 1985), p. 246, no. 133.