Koyo is a Japanese company established in July of 1956 as Ejiri Radiator in Nagoya, Japan (Aichi Prefecture) as a radiator repair shop. Twelve years later in 1968, Ejiri Radiator established a radiator and oil cooler factory in Nagoya. We then separated our production facilities from our repair facilities and began manufacturing radiators. Two years later in 1970, Ejiri Radiator was renamed to Koyo Radiator Manufacturing and began expanding to branches all over Japan. Koyorad quickly developed into an industry leading Aftermarket Radiator Supplier worldwide. With over 57 years of radiator design and manufacturing experience, founder Mr. Ejiri and son soon gained interest in automotive racing.