Jabarkan Bangunan di Marunouchi dari Marunouchi

Kantor Pos Besar Tokyo (tutup)

Stasiun Tokyo, stasiun kereta api antar kota utama di Tokyo

Calbee berkantor pusat di Marunouchi Trust Tower Main. Sementara Konica Minolta berkantor pusat di Marunouchi Center Building.

The Bank of Tokyo-Mitsubishi UFJ

Marunouchi juga menjadi lokasi kantor cabang dari Aeroméxico (Pacific Century Place Marunouchi), Bain & Company, Bayerische Landes Bank, Bloomberg, First National Bank of Boston, BT Group, Citigroup, Banca Commerciale Italiana, Deloitte Touche Tohmatsu, Bank of India, JPMorgan Chase, KPMG, Latham & Watkins, Mellon Bank, Morgan, Lewis & Bockius, Morrison & Foerster, NatWest Group, Nikko Cordial, Nikko Citigroup, Rabobank, Bank Negara Indonesia, Overseas Union Bank, Philadelphia National Bank, PricewaterhouseCoopers, Ropes & Gray, Royal Insurance, Standard Chartered Bank, dan Standard & Poor's.

Japan Airlines dulu berkantor pusat di Tokyo Building.