Where are Kero-Sun kerosene heaters manufactured?

While they are no longer available, Kero-Sun heaters were formerly manufactured in Japan, where the manufacturer, Toyotomi Company, is based. As of 2015, the company still distributes wicks for Kero-Sun heaters.

Toyotomi markets kerosene room heaters, including heaters that use conventional wicks and wickless varieties that use laser burners. Among its current offerings are the compact RCA-2800, which measures less than .5 meter on each side, and the FF-95, which can emit up to 32,400 British thermal units per hour. It also sells kerosene cooking stoves and electrical appliances, including humidifiers, air conditioners, air dust collectors and electrical heating equipment.