Baron Maejima Hisoka (前島 密, January 24, 1835 – April 27, 1919), born Ueno Fusagorō (上野 房五郎), was a Japanese statesman, politician, and businessman in Meiji-period Japan. Maejima founded the Japanese postal service, and is known as Yūbin Seido no Chichi (郵便制度の父), or "Father of the Postal System".