1. Kawakami, K. 1936. Improving potato seed tubers for early summer crop (in Japanese). Nogyo-Keizai 3: 399–405.
2. Kawakami, K. 1939. Early summer potato culture with special reference to seed tubers from fall grown crops (in Japanese). Nogyo-Engei 14: 413–421.
3. Kawakami, K. 1950. Physiological aspects of running-out by potato (in Japanese). Ibid. 25: 979–984.
4. Kawakami, K. 1952. Physiological aspects of potato seed tubers. Mem. Hyogo Agr. Coll. 2: 1–114.
5. Kawakami, K. 1956. Types of potato cultivation in Japan in view of its growing season (in Japanese). Proc. Crop Sci. Soc. Japan 24: 262–268.