日本製鋼所
Beginning in 1906, Kabayama successively served as executive director at "Hakodate Funabari" (Hakodate Shipbuilding), "Hokkaido Tanko Kisen" (Hokkaido Colliery and Steamship), "Nihon Tekkojo" (Japan Steel Works), and "Chiyoda Kasai Hoken" (Chiyoda Fire Insurance). He founded "Kokusai Tsushinsha" and became president in 1914. He inherited the title of "hakushaku" (count) in 1922 and was selected as a member of the House of Peers in 1925. He served as attendant in the suite of commissioner plenipotentiary of the London Naval Conference in 1929. He served as privy councillor in 1946. He also served as the president of "Nichi Bei Kyokai" (America-Japan Society) and president of the International House of Japan.