The Uchinami pluton, which is distributed upstream of the Uchinami-gawa River in Ono City, Fukui Prefecture, consists mainly of altered quartz diorite, granodiorite, and quartz monzodiorite. A previous study reported a Cretaceous K–Ar whole-rock date (106.5 Ma) of the pluton and interpreted it as one of the Cretaceous (post-Tetori–Pre-Nohi) plutonic rocks in the northern part of central Japan. We performed U–Pb dating of zircons from two rock samples of the Uchinami pluton and obtained weighted average ²⁰⁶Pb/²³⁸U dates of 189.3 ± 1.8 Ma and 189.7 ± 1.6 Ma (2σ). The difference between the U–Pb zircon dates and the K–Ar whole-rock date is ca. 80 million years, which is too long for the duration of cooling of the pluton from the crystallization of the zircons. Instead, the K–Ar whole-rock date presumably indicates the rejuvenation by the Miocene intrusive rocks (e.g. Arashimadake Cauldron). Thus, the Uchinami pluton is reasonably a member of the Jurassic Hida Younger Granite but not a Cretaceous pluton.