"Jiyuto Shi"(The history of Liberal Party), supervised by Taisuke ITAGAKI, co-edited by Tomoi UDA and Saburo WADA, published by 五車楼, 1910 (also published as Iwanami bunko of Vol.1, 2, and 3, 1958 for the first edition, and revived in 1997 etc.)
『自由党史』上．下巻　板垣退助監修、宇田友猪、和田三郎共編、五車楼、1910年、岩波文庫上.中.下巻　初版1958年.1997年ほか復刊