Sakazo Nakade and his brother Rokutaro Nakade apprenticed with violin maker Kinpachi Miyamoto in 1930’s. The Nakade brothers travelled to Spain in the 1950s to learn about guitar making from Ramirez and  Hernandez & Aguado. Both were highly regarded as makers of classical guitars in Japan. Rokutaro Nakade died in the early 1970s but Sakazo made guitars until his death in 1993 (aged 87). Sakazo's sons Teruaki, Toshihiko and Yukio Nakade joined him in guitar making in the 1970s as did Rokutaro's son Osamu Nakade - all these names may appear on classical guitar labels.

Source: Reverb.com Sakazo Nakade guitar advert