Chōyo 重譽 (active 12th century, conventional lifedates uncertain — placed in the 12th century, c. 1100–1175) was a late-Heian Japanese Shingon 真言 scholastic, principally remembered as the author of two major doctrinal-systematic compendia preserved in Taishō:
- KR6t0147 Mìzōng jiàoxiàng chāo 祕宗教相鈔 (10 fascicles, T2441) — a “Forty-Eight-Topic” doctrinal-disputation compendium addressing the principal kemmitsu questions of medieval Shingon.
- KR6t0148 Shízhùxīn lùn chāo 十住心論鈔 (3 fascicles, T2442) — a question-and-answer sub-commentary on Kūkai’s Jūjūshin-ron (KR6t0125).
Chōyo’s works belong to the mid-late Heian Shingon scholastic consolidation phase following Saisen’s (濟暹) major sub-commentary corpus. Where Saisen’s sub-commentaries follow Kūkai’s foundational treatises line-by-line, Chōyo’s works are organized as topical question-and-answer compendia — addressing the principal contested questions of kemmitsu doctrine through a graduated sequence of doctrinal-disputation topics.
He is sparsely documented in the standard biographical sources beyond his attested authorship.