The Odakyu Electric Railway forms the core of the Odakyu Group, which comprises 102 companies (as of August 1, 2012) and includes the Enoshima Electric Railway, Hakone Tozan Railway, Odakyu Bus, Odakyu Department Store, and Hyatt Regency Tokyo hotel.
Компания Odakyū Electric Railway входит в Холдинг Odakyū Group, который состоит из 106-ти компаний(на январь 2010-го года) и включает в себя так же компании Enoshima Electric Railway, Hakone Tozan Railway, Odakyu Bus, Odakyu Department Store и Hyatt Regency Tokyo.