Concept

Inō Tadataka

Summary
Inō Tadataka was a Japanese surveyor and cartographer. He is known for completing the first map of Japan using modern surveying techniques. Early life Inō was born in the small village of Ozeki in the middle of Kujūkuri beach, in Kazusa Province (in what is now Chiba Prefecture). He was born to the Jimbō family and his childhood name was Sanjirō. His mother died when he was seven and after a somewhat tumultuous childhood (not uncommon at the time), he was adopted (age 17) by the prosperous Inō family of Sawara (now a district of Katori, Chiba), a town in Shimōsa Province. He ran the family business, expanding its sake brewing and rice-trading concerns, until he retired at the age of 49. After retirement, he moved to Edo and became a pupil of astronomer Takahashi Yoshitoki, from whom he learned Western astronomy, geography, and mathematics. Mission In 1800, after nearly five years of study, the Tokugawa shogunate authorized Inō to perform a survey of the country u
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