Baron Maejima Hisoka (?? ?, January 24, 1835 – April 27, 1919), born Ueno Fusagoro (?? ???), was a Japanese statesman, politician, and businessman in Meiji-period Japan.
Maejima founded the Japanese postal service, and is known as Yubin Seido no Chichi (??????), or "Father of the Postal System".