Background
Katahiro Tatebe was born in 1664. He was born the third son of Naotsune Tatebe, a retainer of the Shogunate. Was placed along with his two brothers, Katayuki and Kataaki, under the tutelage of Takakazu Seki.
賢弘 建部
Katahiro Tatebe was born in 1664. He was born the third son of Naotsune Tatebe, a retainer of the Shogunate. Was placed along with his two brothers, Katayuki and Kataaki, under the tutelage of Takakazu Seki.
Takebe was the favorite student of the Japanese mathematician Seki Takakazu.
Katahiro Tatebe became a confidant of Shogun Yoshimune, and was commissioned with the job of drawing a map of Japan (1719). His work was a great improvement on the map drawn during the Genroku Era.
His skill in mathematics and astronomy made him an adviser to Shogun Yoshimune in matters pertaining to astronomy. He is credited with being the first to introduce trigonometry to Japan.
After the death of Takakazu Seki and Harumi Shibukawa he came to be considered the greatest authority on astronomical mathematics of his time.