21-seiki no minpō : Ono Kōji Kyōju kanreki kinen ronshū = The civil law in the 21st century : festschrift in honor of Koji Ono on the occasion of his 60th birthday / kikaku "Ono Kōji Kyōju Kanreki Kinen Ronshū" Kankō Iinkai.
21世紀の民法 : 小野幸二教授還暦記念論集 = The civil law in the 21st century : festschrift in honor of Kōji Ono on the occasion of his 60th birthday / 企画「小野幸二教授還暦記念論集」刊行委員会.