ROHM is one of the few LED manufacturers to have their own die. This allows integrated production, resulting in good quality and production control as well as superior development systems. ROHM is also capable of responding to detailed requests for color and brightness levels, as well as optical simulation to support customers' development. Every year during the end of the year holiday season, the city of Kyoto in Japan sets up a “ROHM Illumination” light show that uses more than 860,000 LEDs from ROHM. The Kyoto station building is also illuminated with LEDs made by ROHM.