The 203rd Tactical Fighter Squadron () is a squadron of the 2nd Air Wing of the Japan Air Self-Defense Force (JASDF) based at Chitose Air Base, in Hokkaido Prefecture, Japan. It is equipped with Mitsubishi F-15J/DJ and Kawasaki T-4 aircraft.
The squadron was formed at Chitose Air Base at Hokkaido in June 1964 as part of the 2nd Air Wing. It was the third of the JASDF's F-104 units to form. It took over Quick Reaction Alert duties from the North American F-86D Sabre-equipped 103rd Squadron.
On March 24, 1984, the squadron updated from the F-104 to the F-15J/DJ.
The squadron's aircraft have a stylized 203 with a red line, and a bear resembling a panda.
The squadron appeared in the 1990 film Best Guy.