When working at Tohoku Imperial University, he wrote several articles that introduced a new antenna designed by his assistant Shintaro Uda to the English-speaking world.
Antennas of this type were widely used for television and radio reception, and are still common in communication and radar systems.
[citation needed] Yagi also tried, unsuccessfully, to introduce a wireless power transmission system.
[citation needed] After 1930, Hidetsugu Yagi was involved, as a adviser, in the operation of the Number Nine Research Laboratory run by Iwakuro Hideo.
[4] The topic of wireless communication, which he pursued during his studies abroad, would become a research theme to which he would dedicate his entire life.