Nobuaki Koga (古賀 伸明, Koga Nobuaki; born February 23, 1952) is a Japanese unionist. From 2009 to 2015, he served as president of Rengo, the largest national trade union federation in Japan, having previously been its general secretary.
Source: “Nobuaki Koga”, English Wikipedia (CC BY-SA 4.0), excerpt