Usa (宇佐市; -shi) is a city located in Oita, Japan.
As of 2003, the city has an estimated population of 49,021 and the density of 274.94 persons per km². The total area is 178.30 km².
The city was founded on April 1, 1967.
Today "Made in Japan" connotes high quality, technologically advanced manufacturing but during Japan's recovery from WW2 it was synonymous with cheap shoddy products. Some exports were marked "MADE IN USA".