In 1916, he went to America as an international student where he devised his seismic theory of the earthquake-proof wall.
Using the seismic structural theory that he devised, he engineered the Industrial Bank of Japan's main office which was designed by Setsu Watanabe.
This structure withstood the damage and Naitō included this fact in his lectures as the effectiveness of his earthquake-proof design theory had been proven.
Naitō became a member of the Japan Academy in 1960 and he was awarded a distinction for cultural merit in 1962 and the second-class Order of the Rising Sun in 1964.
On August 25, 1970 at 9:05 AM, Tachū Naitō died in the National Tokyo First Hospital, now the International Medical Center of Japan, at 84 years of age.