Koyorad had factories in Japan, China and Indonesia.
From their website : http://www.koyorad.com/faq.asp
Where are Koyorad radiators manufactured? Koyo manufactures four different types of radiators:
OE Aftermarket Plastic Tanks/Aluminum Cores (most common) Design: Japan and China Manufacturing: Indonesia and China OE Aftermarket All Aluminum (Toyota Sienna, Lexus RX, etc) Design: Japan Manufactured: Indonesia or China OE Aftermarket Copper / Brass (select vehicles) Design: Japan Manufacturing: Indonesia Racing All Aluminum Radiators (select performance vehicles) Design: Japan and Indonesia Manufacturing: Japan and Indonesia
Koyo’s R&D departments complete engineering diagrams for each new application. These engineering drawings are then sent to our privately owned ISO-9001 certified factories. Each Koyo radiator is leak tested a total of three times at different stages of the production process before a final visual inspection. Our attention to detail extends further to our rigid boxes, inlet/outlet/corner protection, assuring Koyorad product arrives safely to the end user. Additionally, Koyo conducts “Koyo Training Exchange” programs between our Japan, Indonesia, and China plants from 3 months to a year in the study of Japanese workmanship. This program further ensures the delivery of exceptional Japanese quality to the end user.
