Masahisa Fujita (藤田 昌久, Fujita Masahisa, born 21 July 1943) is a Japanese economist who has studied regional science, urban economics, international trade, and spatial economy (new economic geography).

Fujita majored in urban planning as an undergraduate at Kyoto University.

He was the President of Institute of Developing Economies during 2003 to 2007, and proposed a basic concept of Economic Research Institute for ASEAN and East Asia to JETRO and METI.

Fujita is known as one of the pioneers of New Economic Geography, as well as Paul Krugman.

Fujita is the recipient of the 1983 Tord Palander Prize, the 1998 Walter Isard Award in regional science, and was also awarded the first Alonso Prize, alongside Paul Krugman.