Hayashi Hōkō

, also known as Hayashi Nobutatsu, was a Japanese Neo-Confucian scholar, teacher and administrator in the system of higher education maintained by the Tokugawa bakufu during the Edo period. He was a member of the Hayashi clan of Confucian scholars.

Hōkō was the tutor of Tokugawa Tsuneyoshi.

Following in the footsteps of his father, Hayashi Gahō, and his grandfather, Hayashi Razan, Hōkō would be the arbiter of official neo-Confucian doctrine of the Tokugawa shogunate. As a result of his urging, the shōgun invested Confucian scholars as samurai.

The scholars of the Hayashi school were taught to apply what they had learned from a Confucian curriculum. Typically, they applied the Confucian texts conservatively, relying on Soong Confucian analysis and metaphysical teachings.

The neo-Confucianist scholar Arai Hakuseki generally expressed scant regard for opinions expressed by Hayashi Hōkō.