From 1994 until retirement in 1996, he served as advisor in the same laboratory. Hayashi died of acute leukemia in 2005.

Awards and honors

*Fujihara Award, Japan (1946)
*Prize from Institute of Electronics and Communication Engineers, Japan (1975)
*J J Ebers Award, IEEE (1984)
*Asahi Prize, Japan (1986)
*C&C Prize