Mount Yakeishi, Volcano in Ōshū and Nishiwaga, Iwate, Japan

Mount Yakeishi is a 1,548 m volcano on the border of Oshu and Nishiwaga in Iwate Prefecture, the main peak of the Yakeishi Range in the Ōu Mountains and part of Kurikoma Quasi-National Park. Its summit area is covered in dense low green vegetation, with a band of dark grey exposed rock breaking through the middle slope. The mountain body consists of pyroxene andesite, and a first-order triangulation point at the summit marks 1,547.28 m.

Mount Yakeishi is a Quaternary volcano built mainly of pyroxene andesite, the highest point of the Yakeishi Range that also includes Ushigatayama and Komagatake. It has shown no notable activity in recent times. Its summit area holds a first-order triangulation point at 1,547.28 m, and cattle grazing with rainbow trout stocking took place around Yakeishi Pond until about 1993.

The name Yakeishi comes from the burnt-looking stones found near the summit, a reference to the andesite rock that forms the mountain. Cattle were grazed around Yakeishi Pond until about 1993, with up to 140 head at a time, and the herders released rainbow trout into the pond for food; the trout still live there wild.

Trails start from the Ishibuchi Dam side at the Nakanuma trailhead, passing Nakanuma and Uwanuma ponds before the summit; other routes come from Yumoto Onsen via Keizukayama (1,373 m) and Kanmyosui, from Nishiwaga, from the Omoriyama tunnel, and from the third station in Higashinaruse, Akita, which is the shortest approach. The mountain holds heavy lingering snow, so the flower fields below the summit at Ubaishidaira are usually walked from early June into late summer.

The name Yakeishi means something close to burned stone in Japanese, a direct reference to the volcanic origin of the peak that is still readable in its rock formations today. This makes it one of the few mountains in Japan where the name itself tells the story of how it was formed.