A YAMAP activity log published on 12 November 2026 describes a short walk the author says they took the previous day toward the Matsuoka-dera ruins (松岡寺跡) in Hasadani-cho, Komatsu City (小松市波佐谷町). The recorded activity lasted 14 minutes over 337 meters, with 19 meters of ascent and 24 meters of descent and no rest. YAMAP rates the course as easy, with a course constant of 0 calculated from a standard time of 8 minutes. The log lists times around 16:05 to 16:20.
The author writes that hiking was not the plan. They had gone to a special exhibition at the Ogoya Mine Museum (尾小屋鉱山資料館), also in Komatsu. On the way back, a tourist information board near the parking area at Junidaki (十二滝) listed the Matsuoka-dera ruins, and they followed Google Maps there. In the same account, the author notes that a student from a nearby special-needs school died in an accident at Junidaki earlier that summer; the log gives no further details.
The trailhead is beside Iso-mae Shrine (磯前神社). The author passed a sign reading “Danger” (キケン) and climbed stairs described as fairly high, with moderately narrow treads. After the stone steps, the route became a dirt path that was muddy and slippery; they held the surrounding grass while climbing.
Near the top, a marker post still showed faint black lettering for “Himuro ato” (氷室跡), the ice-house ruins. At its foot was an oval pit the author estimated by eye at about 2 meters high and 4 to 5 meters across, and which they thought could hold one or two bears. Beyond it was a cleared plateau with an electricity transmission tower.
At the lowest part of the ice-house remains, the author describes a hole large enough for one person to crawl into and guesses it may have been used for moving things in and out. A softball-sized opening in the side wall, they suggest, might have been an air hole. The post presents these as the author’s own speculation and notes that there was no explanatory sign.
Farther along, the path descended. A marker with faded black text pointed toward the Matsuoka-dera ruins and also indicated a return to the ice-house site. The author did not think the trail continuing downhill actually reached the temple ruins.
With the time nearing 4:30 p.m. and autumn dusk coming early, they returned to the ice-house ruins, went down the stone steps to the trailhead beside the shrine, and walked back to the parking area.
