He graduated from the University of Iowa in 1964, where he received his PhD. His dissertation was titled Generalized learning network using adaptive threshold elements.[5]
Ishida is credited with introducing the Internet to Japan, elucidating its vast potential for online work and facilitating accessibility to UNIX computing.[4][1]
Ishida died on 9 March 2009. A prominent figure in the history of the Japanese Internet, he was named by Toru Takahashi and Jun Murai.[6]