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investigators that there were two men and a woman that had gone missing at the park. However, there was no record of the missing female in
Asahidake and Iwamura was said to have gone alone into the mountain. The identity of the woman and the potential relationship to Iwamura was unknown and caused confusion in the investigation and media coverage.
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There is a large rock nicknamed the "Safe Rock" on the ridge of Mount
Asahidake which is used as a guidepost. However, there is also a similar large rock nicknamed the "Fake Safe Rock" near the Safe Rock, and if one were to accidentally fall from the Fake Safe Rock they would be in the area where the
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The purpose of the SOS tape recording is unknown, but it is speculated that the man on the recording, who was stuck, recorded it so that the search team could hear it before he became debilitated and unable to speak. It is also possible that it was accidentally switched on and recorded while the man
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The wooden letters of the SOS sign were made by stacking large fallen birch trees, and it was estimated that it took about two days and considerable effort to create such a giant sign. It was speculated that the sign was made by the missing person that the skeleton belonged to, but in the autopsy of
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and were identified initially as those of a woman aged 20–40 years. On 27 July, the police decided to play the recordings on the cassette tapes. On one of the recordings, the voice of a young man is heard shouting for 2 minutes and 17 seconds. A translation of the man shouting on the recording is as
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grove that grows sideways. It is easy to enter from the top, but it is difficult to climb from the bottom to the top. There is a cliff where the incident occurred. The terrain is difficult to escape; in fact, a few days after the incident was discovered, a news media interview team who visited the
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An acquaintance of
Iwamura gave testimony that Iwamura had been carrying a recording of theme songs on a tape, as well as the same size of basketball shoes that were discovered in the recent search. On the other hand, since the human skeleton was initially identified as a female, it was thought by
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The
Hokkaido police believed that the SOS letters made of wood had been constructed by the two people that they had rescued. However, when the police debriefed the two people about the situation after the rescue, they did not know anything about the SOS sign. The Hokkaido police, who thought that
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in the vicinity (initially determined to belong to a female) in addition to personal belongings of a presumed-male hiker found stuffed into a tree root not far from the sign. The items included an ID (belonging to Kenji
Iwamura, a man who had been missing since 1984), 2 cameras, a notebook, and a
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on 10 July 1984 after he set out hiking to
Asahidake. When Iwamura failed to appear for work a week later, his parents asked police to search for him, but they found no trace. As of 2024, Iwamura has been missing for 40 years, and police believed that he is deceased.
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men were lost after mountaineering. While going through the climbing route, they deviated down Mount
Asahidake, south towards the Chubetsu river. The Hokkaido police searched in a helicopter and ended up finding a giant SOS sign made of 19
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message built from fallen birch logs, but the mountaineers had not created this message, which was determined to have been in place since at least 1987. After returning to search the area for more missing people the next day, police found
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with traces of animal bites. It appeared that some of the bones had been fractured prior to death. In a separate area near the SOS sign, the police discovered a hole just large enough to fit a single human, which included four
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was yelling for help. Many have speculated that the man yelling was
Iwamura, but when Iwamura's parents were asked about the recording, they could not confirm that the voice on the recording was their son's.
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The
Asahikawa East police station announced on 28 February 1990 that after a reexamination of all the human bones that were found, they now believed that the skeleton was actually male, not female.
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the skeleton that was found, who investigators believed was
Iwamura, the body was described as thin and weak to the point that it would have been impossible for him to make the sign on his own. No
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took a look at previous topographic map data used to find aerial photographs, in which it was confirmed that the SOS sign was in the images taken on 20 September 1987.
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there was another victim, dispatched a helicopter again on the following day and searched the surrounding area. The police discovered fragments of
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287:. In addition, a cutout of artwork of "Magical Princess Minky Momo" was used as a case for the cassette tape. In regards to the SOS sign, the
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On the afternoon of 24 July 1989, on the path from Mount Kurodake to Mount Asahidake of Daisetsuzan National Park, two
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tape recorder with tapes featuring a distressed man calling for help. It is still not known who constructed the sign.
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that could have been used to cut trees down to make the sign has been found. Some have pointed out that
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in Japan in 1989. Two lost mountaineers were located and rescued after search teams spotted a large
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has a scene in which fallen trees are arranged in the shape of SOS.
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SOS incident occurred. The slope above the main area is a dense
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site was unable to escape from the area and had to be rescued.
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The rest of the tapes included music from the anime TV shows,
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of Kenji Iwamura, a 25-year-old male office worker from
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SOS, help me, I can't move on the cliff, SOS, help me.
550:"虫ん坊 2018年6月号（195 手塚マンガあの日あの時 あんなネタこんなネタ、小ネタコレクション!!"
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582:"Driver's License Found Near SOS on Mountain Slope"
267:The place is where I first met the helicopter. The
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454:"過去の放送内容 【第84回】「山の上の巨大構造物"SOS遭難事件"の真相とは？」(3月1日放送)"
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271:is deep and you can't go up. Lift me up from here.
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16:Mountain rescue case in Japan during the 1980s
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650:. 探偵ファイル～山口敏太郎の怪奇探偵～. Archived from
395:"北の山中 届かなかった・SOS 近くに白骨、遭難か 北海道・旭岳".
525:"「SOS」ナゾなお深く 女性の骨 男性の靴 結ぶ"線"浮かばず".
612:"遭難事故の多い旭岳。なぜ？どこで？実際の事故原因から学ぶ対策方法"
433:"大雪山系 「SOS」文字 そばに人骨 遭難者か、倒木を並べる".
14:
413:"「SOS」木文字 近くに白骨散乱 大雪山系の湿原 遭難者か".
49:Aerial view of the giant SOS sign
556:. 株式会社手塚プロダクション. Archived from
68:10 July 1984 – 28 February 1990
141:Kenji Iwamura, possibly others
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714:Missing person cases in Japan
256:The human bones were sent to
293:Japan Geographical Authority
258:Asahikawa Medical University
284:Magical Princess Minky Momo
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489:"大雪山遭難 テープ再生 叫び悲痛 2分17秒".
144:Two missing hikers rescued
699:July 1989 events in Japan
162:Daisetsuzan National Park
105:, unexplained occurrences
81:Daisetsuzan National Park
58:
42:
689:Unsolved deaths in Japan
684:Mountaineering disasters
618:. スペースキー. Archived from
462:. TBSテレビ. Archived from
694:1989 disasters in Japan
648:"謎のテープレコーダー 大雪山SOS事件とは"
371:List of unsolved deaths
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31:considered for merging
709:Disasters in Hokkaido
595:"愛知の男性と断定 「SOS」の人骨".
319:Cause of the incident
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289:Japan Forestry Agency
704:History of Hokkaido
610:高橋典子 (2020-09-12).
306:Aspects of the case
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507:"「SOS」周辺の捜索打ち切り".
356:SOS tape recording
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224:, a pair of men's
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584:. July 30, 1989.
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246:Aichi Prefecture
238:driver's license
226:basketball shoes
171:skeletal remains
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55:Native name
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103:unsolved deaths
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99:Disappearances
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622:on 2021-03-02
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599:. 1990-03-01.
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560:on 2018-06-06
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529:. 1989-07-29.
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511:. 1989-07-28.
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466:on 2020-09-21
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459:上田晋也のニッポンの過去問
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437:. 1989-07-26.
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26:Infobox event
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656:. Retrieved
652:the original
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620:the original
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562:. Retrieved
558:the original
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468:. Retrieved
464:the original
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344:Osamu Tezuka
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333:The SOS sign
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156:occurred in
154:SOS incident
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38:SOS incident
24:
218:human skull
197:human bones
189:birch trees
20:‹ The
673:Categories
658:2021-10-02
626:2021-10-02
564:2021-10-02
470:2021-10-02
377:References
236:, and the
178:Background
131:At least 1
616:YAMA HACK
554:手塚治虫公式サイト
349:Astro Boy
314:Safe Rock
261:follows:
122:Cold case
29:is being
597:朝日新聞（夕刊）
509:毎日新聞（夕刊）
365:See also
291:and the
234:notebook
210:backpack
85:Hokkaidō
73:Location
65:Duration
33:. ›
22:template
278:Macross
250:missing
230:cameras
214:amulets
212:, some
136:Missing
118:Outcome
113:Unknown
59:SOS遭難事件
228:, two
222:tripod
128:Deaths
644:山口敏太郎
242:Kōnan
184:Tokyo
110:Cause
89:Japan
546:黒沢哲哉
527:朝日新聞
491:朝日新聞
435:読売新聞
415:毎日新聞
397:朝日新聞
326:sasa
281:and
269:sasa
232:, a
220:, a
216:, a
208:, a
204:, a
152:The
95:Type
346:'s
340:axe
166:SOS
160:in
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635:^
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443:^
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385:^
244:,
101:,
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83:,
79:,
661:.
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567:.
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