Question: Tachū Naitō was the builder of which observation tower in the Shiba-koen district of Minato, Tokyo?
Sentence (from "Tachū Naitō"): Tachū Naitō (内藤 多仲 , "Naitō Tachū" , 12 June 1886 - 25 August 1970) was a Japanese architect, engineer, and professor from Yamanashi Prefecture, Minami-Alps, Yamanashi.
Relevant evidence: No