|1928||- First Japanese low-press air jet oil burner developed. Trade mark "VOLCANO" adopted.
- Osaka Heavy Oil Furnace Manufacturing Company established.
|1932||- Forged furnaces of army and navy foundries converted into heavy oil furnaces.|
|1933||- Pressure-jet type burner completed. Installed in Sasebo and Yokosuka factory boilers with excellent results.|
|1938||- VOLCANO Specified for all naval work vessels burners.|
|1939||- Coal fired semi-gas furnace developed.|
|1941||- Delivered a heating flue boiler for the train between Tokyo and Numazu.|
|1943||- Company Reorganized to Osaka Heavy Oil Furnace Manufacturing Co., Ltd., with capital of 300,000 yen.|
|1949||- Capital increased to 1 million yen.|