Sudo Katsuzō (c. 1848 - c. 1874) (湏藤 / 湏藤勝三) was a Japanese cartographer of Tochigi Prefecture (栃木県 / Tochigi-ken), Japan. Sudo was part of an 1874 mission to Taiwan and subsequently to the mainland of China. As part of this expedition, he produced a series of maps detailing Taiwan and some major cities in Fujian, including Fuzhou and Xiamen. The quality and execution of the maps suggest that he was experienced in both western and Japanese cartographic styles, indicating that he may have had training as a military engineer. Sudo apparently died of an unknown illness shortly after the maps were made, at just 26, so it is not surprising that little is recorded regarding his history. His maps were subsequently collected by his brother and remained in the family until recently.