The '''SOS incident''' occurred in [[Mount Asahidake]] in [[Daisetsuzan National Park]] in during the periods of 1984 to 19901989. In 1989, twoTwo lost mountaineers were located and rescued after search teams spotted a large [[SOS]] message built from fallen birch logs, but the mountaineers had not created this message. ItWhile wassearching foundthe toarea havefor beenother inmissing placepeople forthe severalnext years previouslyday, andpolice whofound built[[Human itskeleton|skeletal isremains]] unknown.in Thethe area, with the ID of a hiker who wenthad been missing insince 1984. alongThe withmessage [[Humanwas skeleton|skeletallater remains]]found wereto foundhave been in place since at least 1987, and it is not known who constructed it.
