Teijiro Kawamata served as managing director of Odakyu, Tokyu and Teito Electric Railway Companies and then became vice-president of Sagami Railway Company (1943). He served also as director of Kansai Fudosan (Real Estate) Company, Sagami Fudosan Company and Kinugawa Kogyo (Industrial) Company. Holds additional posts of president of Nihon Jari Kyokai (Japan Gravel Association), adviser of Kanagawa Prefectural Kanko (Tourist Industry) Association and president of Toyo-pet Taxicab Company.