Since the launch in 1986 we have been creating new products which had not existed in order to utilize the energy more safely and effectively. "More free" as the concept of our mission is to challenge new things. Recently, the global environment is at an important crossroad. There are strong needs for new safe and effective technologies to utilize renewable energies, which includes solar power generation and the wind power generation. We are contributing to the conservation of the global environment through introducing insulation resistance testers for solar power generation into the market. It was the first product in the industry.