On May 1, 1942, Odakyu merged with the Tokyo-Yokohama Electric Railway company (now Tokyu Corporation), which controlled all private railway services west and south of Tokyo by the end of World War II.
Pada 1 Mei 1942, Odakyu bergabung dengan perusahaan Kereta Api Listrik Tokyo-Yokohama (sekarang Tokyu Corporation), yang mengendalikan seluruh layanan kereta api swasta di bagian barat dan selatan Tokyo di akhir Perang Dunia II.