The Society of Japanese Aerospace Companies (SJAC) is the sole public entity representing the interests of the Japanese aerospace industry.

SJAC was established with the purpose of contributing to the expansion of Japan's aerospace industry, the overall improvement of Japan's welfare - through production enhancement and trade expansion of aerospace-related products - and sound growth of the aeorpsace industry as a whole.

SJAC delivers broad investigations of the production, distribution, commerce, market research, documentation and information collection of aerospace components.