Doi Toshikatsu Doi Toshikatsu The adopted son of Doi Toshimasa, Toshikatsu is generally believed to be the biological son of Mizuno Nobumoto, though there are some who claim he was an illegitimate son of shōgun Tokugawa Ieyasu. He served the shogunate as advisor to shōgun Tokugawa Hidetada for many years, and played an important role in communicating and overseeing the enforcement of shogunal policy across the country; Doi also helped effect trade and diplomatic relations between Japan and the Thai Kingdom of Ayutthaya. He lost much of his influence and power upon Hidetada's death in 1632. Six years later, Doi became one
Nelson Doi Islands. Upon his retirement from that court, Doi taught at various schools in Japan. Doi returned to Waimea on the Big Island of Hawaii where he helped build the North Hawaii Community Hospital. Nelson Doi Nelson Kiyoshi Doi (January 1, 1922 – May 16, 2015), was the fifth lieutenant governor of Hawaii from 1974 to 1978 in the first elected administration of Governor George Ariyoshi. Doi was a member of the Hawaii Democratic Party. Doi attended the University of Hawaii, where he was president of the Associated Students of the University of Hawaii from December 1944 to June 1945 (Yim).