|April, 1969||Sanei Electronics Laboratory was founded.|
|September, 1971||Company was renamed to SUN-A.|
|February, 1998||The capital was increased to 4 million yen.|
|April, 2004||Volume production of urea quality sensor was started as a subcontract from MITSUI MINING & SMELTING CO., LTD.|
|October, 2005||Head office and Miyoshi factory was newly constructed at Miyoshi Industrial Park and started the operation.|
|May, 2007||The advanced laboratory was founded and started the operation as a dedicated factory for urea quality sensor.|
|August, 2009||Urea quality sensor business was transferred to SUN-A from MITSUI MINING & SMELTING CO., LTD.
Sales has been started as our own brand.
|February, 2010||Fuel quality sensor was developed and put on the market.|
|December, 2011||Saitama office was opened as a base office for sales of urea quality sensor.|
|September, 2012||Custom power module business was transferred to SHINDENGEN ELECTRIC MANUFACTURING CO.LTD.|
|May, 2013||The capital was increased to 310 million yen by receiving investment from Hiroshima Innovation Network Inc.
The advanced laboratory was renamed to Miyoshi center, specialized to sensor business.
|April, 2015||Business-related patent rights has been inherited from MITSUI MINING & SMELTING CO., LTD.|
|August, 2015||Kuriyama Corporation has become our parent company and principal shareholder instead of Hiroshima Innovation Network Inc.|