[1] After graduating from the University of Tokyo, Nobuchika joined Shibaura Seisakusho as a mechanical engineer.
In 1923, he left Shibaura and founded Sugimura International Patent and Trademark Attorneys.
In 1925, he assisted Hidetsugu Yagi in securing a patent for the Yagi–Uda antenna.
Yagi is listed among the Ten Japanese Great Inventors by the Japan Patent Office for this very invention.
In 1961, he was awarded by the Government of Japan with the Medal of Honor with Blue Ribbon (藍綬褒章) for all his contributions as a patent attorney.