The group originated as a rail transport operator, but has since diversified its operations to include real estate, retail, B2B, finance (credit card), fiber optic networking, personal storage, travel sales, and bus services.

Large department stores by Shinjuku, Machida and Fujisawa stations, called Odakyu Hyakkaten.

The group member companies even consist of other areas such as affiliated florists and auto dealerships.

Odakyu Group includes hotels, resorts (Odakyu Resorts 小田急リゾーツ), travel agencies, outlet malls, golf courses, and restaurants, common among large railway companies in Japan, and even residential apartment blocks.

Along with Odakyu Electric Railway, Kanagawa Central Transport Kanachu Bus (神奈川中央交通株式会社) is listed on Section 1 of the Tokyo Stock Exchange.