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
Doi (retailer) Doi (retailer) Its roots go back to Doi Shōten (), also referred to as Doi Shōkai (). This was a Japanese retailer, distributor, or both, that started in 1949. ("Doi" here is a surname, "shōten" means "retailer", and "shōkai" means "trading company".) In the early fifties it was based in Osaka. Kimio Doi (, "Doi Kimio"), son of the Mr. Doi of Doi Shōten, started a branch in Fukuoka at some time around 1956. In 1959 this became plain Doi (, "Kabushiki Kaisha Doi"). Doi provided diverse services, such as professional darkroom work. Retail stores were branded "Camera no Doi"