From GHNFrom Milestones talk:Commercialization and Industrialization of Photovoltaic Cells, 1959
on your page [ website http://www.ieeeghn.org/wiki/index.php/Milestones:Commercialization_and_Industrialization_of_Photovoltaic_Cells,_1959 ] the following is written.
In the early 1960s NEC Corporation was the leading manufacturer in the area of PV-cells in Japan. In fact, as of 1961 NEC’s PV-cells had been installed in all of 6 wireless relay stations and 8 lighthouses in Japan."
Due you have any source available, that confirms both facts?