Japan's Strangest Unsolved Mystery

A video on YouTube. In True Crime & Mysteries, a Krater category.

Summary by Krater

An exploration into the mysterious 1989 incident where hikers built a massive SOS sign on Mount Asahidake in Hokkaido, Japan, and the subsequent investigation that uncovered unexpected bone evidence.

From the video

Answers: What is the mystery behind the SOS sign on Mount Asahidake?

Mount Asahidake SOS mystery
Hokkaido hiking tragedy
Unsolved Japanese mysteries
Police investigation of human remains
Kenji Iwamura case

What it concludes

The SOS sign on Mount Asahidake was constructed using 19 birch logs weighing between 150 and 400 lbs each.
Initial bone analysis incorrectly identified the remains as a female aged 20-40 who died 1 to 3 years prior.
Subsequent re-examination of the bones in 1990 reclassified them as belonging to a man with blood type-A.
Police identified the bones as belonging to Kenji Iwamura through a license and backpack found nearby.
It remains logistically implausible for a single injured person to build the massive SOS sign alone without help.

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