Aokigahara is a location reputed to be haunted in Yamanashi, JP. Its reputation comes from reported apparitions, unexplained phenomena and eyewitness accounts gathered over time.
Where is Aokigahara?
Location
Yamanashi, JP
Type
Forest / nature
Coordinates
35.47, 138.62
Testimonies
0
Last updated
LOCATION
Why is Aokigahara said to be haunted?
Aokigahara is a forest of roughly 30 square kilometres on the north-western flank of Mount Fuji, between about 900 and 1,300 metres, straddling the village of Narusawa and the town of Fujikawaguchiko in Yamanashi Prefecture. It grew on the Aokigahara lava flow, erupted from a fissure on that flank between 864 and 866 CE, which reached Lake Motosu and split an older lake into the two now called Shoji and Sai. It is not the volcano's last eruption: that was Hoei, in 1707. The soil is barely there, leaf litter and humus over bare lava, and the canopy is dominated by hinoki cypress and Tsuga sieboldii rather than the deciduous trees the climate would predict, which is where the name Jukai, sea of trees, comes from. Despite the label primeval, the forest has been worked: the average hinoki is about 113 years old, hinoki was felled here from the Edo period into early Meiji, and charcoal kilns have been found among the trees. Aokigahara is prefectural forest and the strictest class of protected zone in Fuji-Hakone-Izu National Park; leaving the marked boardwalks is prohibited. Since 2008 the municipalities, the prefecture and local businesses have run a daily outreach and support programme in the forest.
Aokigahara begins as an accident of drainage. In June of the year 864 a fissure 5.7 km long opened on the north-western flank of Mount Fuji and went on erupting for more than two years. The Japan Meteorological Agency's chronology of Fuji's historical activity records the outcome flatly: lava flowed from near Nagaoyama, the arm running north-west reached Lake Motosu and split the old lake called Se-no-umi into the two now named Shōji and Sai, and houses were buried. The Geological Survey of Japan puts the Jōgan eruption at AD 864–866 and its output at roughly 1.3–1.5 km³ of magma, depending which official estimate you take.
What grew back sits on that rock and behaves accordingly. Yamanashi Prefecture's own eco-tour guideline defines the area as "roughly 30 square kilometres of so-called primeval forest spreading over the Aokigahara lava flow", between about 900 and 1,300 m, straddling the village of Narusawa and the town of Fujikawaguchiko. A permanent study plot run by ecologists from Ibaraki University found the soil almost nonexistent — leaf litter and humus over bare lava, with almost no horizon structure — and the canopy dominated not by the deciduous trees the regional climate should produce but by hinoki cypress (Chamaecyparis obtusa), 45.4 % of basal area, and Tsuga sieboldii, 26.3 %.
Which brings up the thing least often said about Aokigahara: it is not untouched. The same study cites Kiyofuji's 1991 age survey, in which the oldest hinoki was about 240 years and the average only 113, and historical documents showing hinoki were felled here from the Edo period into early Meiji. Tsuga, useless as timber, was mostly left — which is why tsuga over 300 years old survive and hinoki does not. And the remains of charcoal kilns have been found inside the forest: broadleaves were burnt to charcoal on the spot and carried out, a use that continued widely until recent decades. The word jukai, "sea of trees", describes a canopy, not a wilderness. The two municipalities put it in one line of their own handbook: "in the past it was a forest that supported the lives of local people."
Nor is it national forest, as is usually assumed: Aokigahara is Yamanashi prefectural forest, part of the onshirin estate granted to the prefecture in 1911, and it heads the Ministry of the Environment's table of Special Protection Zones for Fuji-Hakone-Izu National Park at 1,225 hectares, every parcel publicly owned. It had been a National Natural Monument since February 1926, well before the park itself.
The dark reputation is the newest layer, and the one where the sources stop agreeing. It is routinely traced to a Seichō Matsumoto novel, but two different novels get the credit and neither attribution survives the record. Nami no Tō ("Tower of Waves") was serialised in Josei Jishin and published by Kobunsha in 1960, not 1961; the National Diet Library catalogue holds that edition under that year. Kuroi Jukai — literally "black sea of trees", which is presumably why it gets swept in — was published by Kodansha, also in 1960, and Kodansha's own synopsis places it at a bus crash near Hamamatsu and inside a newspaper office. It has nothing to do with Fuji. Bungeishunju's current edition of Nami no Tō summarises the plot as a doomed affair between a young prosecutor and the wife of a man implicated in a ministry corruption case, and never mentions the forest.
Against that, the two local governments date the change themselves, and not to 1960. Their handbook says the forest "became famous as a place of suicide from the Shōwa 40s" — that is, 1965–1974, a decade or more after either book. By 1988 a psychiatrist at Yamanashi Medical College, Yoshitomo Takahashi, could open a paper in Suicide and Life-Threatening Behavior by stating the association as established background. In July 1993 Ohta Books published Wataru Tsurumi's Kanzen Jisatsu Manyuaru, 198 pages, still advertised by the publisher in its own words as "a suicide device made of words"; between 1999 and 2023 at least five prefectures — Kanagawa first, on 22 October 1999 — designated it a publication harmful to young people. Whether that book names Aokigahara is a claim this file could not verify from any source it accepts.
What is documented in detail is the response. In June 2008 the municipalities, local businesses and the prefecture formed the Inochi wo Tsunagu Aokigahara Network Conference, chaired by the mayor of Fujikawaguchiko. Its outreach programme, catalogued by Japan's national suicide-prevention centre, puts two teams of two paid staff on patrol every day of the year, roughly 09:00 to 17:00, around the caves, car parks and boardwalks, backed by shopkeepers, the bus and taxi companies, a drug-rehabilitation NPO on night rounds, a police box in the summer holidays and, since FY2024, drones after dark. The published results are counted in people helped: 346 approached and 48 taken into protection in FY2020; 2,359 approached and 525 taken into protection between FY2012 and FY2019 — at zero cost to the municipalities.
The other half of the answer is about narrative. Yamanashi's Third Suicide Prevention Plan (2024–2028) commits two named departments in writing: forestry policy "will dispel the image of a 'famous suicide spot', including by not permitting the use of prefectural land such as Aokigahara Jukai for the filming of films or television programmes that risk encouraging suicide", and tourism confirms the prefectural film commission will not support such shoots. The prefecture's own 2025 booklet is titled The Truth About Aokigahara Jukai: moss, lava caves, guides and food, in which the word "suicide" does not appear once.
Timeline: the documented record of Aokigahara
864–866 — the Jōgan eruptionA fissure 5.7 km long opens on Mount Fuji's north-western flank and erupts for more than two years. Lava from near Nagaoyama reaches Lake Motosu, splits the old lake Se-no-umi into Shōji and Sai, buries houses and kills the lake's fish. Total output is estimated at roughly 1.3 to 1.5 km3 of magma.
1911 — the forest changes handsThe imperial forest estate is granted to Yamanashi Prefecture and becomes the onshirin, some 158,000 hectares covering about 35 % of the prefecture. Aokigahara is prefectural forest, not national forest, and entry permits are issued by the prefecture to this day.
24 February 1926The forest is designated a National Natural Monument. The lava caves and lava tree moulds of the same flow follow on 17 December 1929. The state's interest in this place was geological and botanical long before it was anything else.
1 February 1936Fuji-Hakone National Park is designated, later renamed Fuji-Hakone-Izu. Aokigahara is listed first in the park's table of Special Protection Zones, 1,225 hectares, every parcel of it publicly owned, with a contiguous Class-1 Special Zone of 1,311 hectares alongside.
1943 — the lava that founded a disciplineTakesi Nagata publishes his rock-magnetism study of the Aokigahara lava, showing that a lava's magnetisation survives sampling and can be read as a record of the ancient geomagnetic field. A later Shizuoka University report calls it the moment the curtain rose on modern palaeomagnetism.
1960 — the two novelsBoth novels routinely blamed for the forest's reputation are published this year, not in 1961: Nami no To by Kobunsha and Kuroi Jukai by Kodansha. Kodansha's own synopsis places Kuroi Jukai at a bus crash near Hamamatsu, with no connection to Mount Fuji.
The Showa 40s (1965-1974)The two municipalities that contain the forest date the change themselves, in their own handbook: in the past it was a forest that supported the lives of local people, but from the Showa 40s it became famous as a place of suicide. That is a decade or more after either novel.
1988Yoshitomo Takahashi, a psychiatrist at Yamanashi Medical College, opens a paper in Suicide and Life-Threatening Behavior by stating the association as established background. It is the earliest peer-reviewed source this file could verify.
July 1993Ohta Books publishes Wataru Tsurumi's Kanzen Jisatsu Manyuaru, 198 pages, advertised by the publisher in its own words as a suicide device made of words. Whether the book names Aokigahara could not be verified from any source this file accepts.
22 October 1999Kanagawa Prefecture formally designates the book a publication harmful to young people. It is the earliest such designation traceable in an official record; at least five prefectures did the same between 1999 and 2023.
June 2008The surrounding municipalities, local businesses and the prefecture form the Aokigahara Network Conference, chaired by the mayor of Fujikawaguchiko. Its outreach programme puts two teams of two on patrol every day of the year and reports 2,359 people approached and 525 taken into protection between FY2012 and FY2019.
July 2013 to April 2014The Yamanashi Nichinichi Shimbun runs 43 instalments in seven parts on the forest. Its desk chief describes the aim as overwriting the prevailing image with that of a beautiful and powerful forest of life.
2024-2028Yamanashi's Third Suicide Prevention Plan commits the forestry division to refusing the use of prefectural land such as Aokigahara for filming that risks encouraging suicide, and the tourism division to withholding film-commission support. The same plan records that about 30 % of the people found in the prefecture lived elsewhere, and sets a target for reducing that number.
Is there a rational explanation for Aokigahara?
Aokigahara attracts more confident assertions per hectare than almost anywhere in Japan. Four are worth taking apart, and the fifth is about this page.
"Compasses don't work in Aokigahara." The remarkable thing is how little institutional support this has. No Japanese public body appears to publish it: not the Geospatial Information Authority in its material on geomagnetism, not the Meteorological Agency's Kakioka Geomagnetic Observatory in its public Q&A, not the Geological Survey of Japan in its notes to the Fuji geological map. Yamanashi Prefecture published a booklet in 2025 whose whole purpose is correcting myths about this forest, and the character for "magnetism" does not occur in it once.
There is a real fact underneath, and it is better than the legend. Rock magnetism on Fuji is genuinely strong and stable — so much so that Takesi Nagata used the Aokigahara lava in 1943 to show that a lava's magnetisation survives sampling and can be read as a record of the ancient geomagnetic field, a paper a 1997 Shizuoka University report calls the moment "the curtain rose on modern palaeomagnetism". The same report describes what that means in the field: some Fuji lavas are magnetised strongly enough to disturb a bearing taken with a clinometer, so the geologists ran kite string out to a point well clear of the rock and used the distant reading whenever the near one was affected. That is the whole phenomenon. Lay an instrument on magnetised basalt and it reads the basalt; hold it at walking height and it reads the Earth. People do get lost here — but the prefecture's own explanation is a lava floor pitted with holes hidden under fallen leaves, which is why stepping off the boardwalk is prohibited outright.
"An untouched primeval forest." The tourist literature says genseirin; the ecology says otherwise. Age surveys found the oldest hinoki about 240 years old and the mean only 113, documents record hinoki cut from Edo into early Meiji, and charcoal kilns have been found among the trees. The ecologists suggest this human disturbance is part of why oak is scarce and conifers dominate a site whose climate should produce deciduous forest. Aokigahara is about 1,160 years old as a lava surface and rather less than 250 in most of its standing timber.
"A 1961 novel made it the suicide forest." This is the claim this file most wanted to settle, and the honest answer is that the sources do not agree — so we will not pretend they do. The bibliography is clear enough: both candidate novels appeared in 1960, not 1961, and one of them, Kuroi Jukai, is set around a bus crash near Hamamatsu and has nothing to do with Fuji at all, apparently dragged in by its title. But the serious problem is the date. The two municipalities that contain the forest say in their own handbook that it became known as a place of suicide "from the Shōwa 40s", 1965–1974 — a decade or more after either book. A monocausal story is exactly what the World Health Organization warns against when it tells reporters not to reduce suicide to a single factor, and here it does not even fit the calendar. What can be said is narrower: by 1988 the association was established enough for a Yamanashi psychiatrist to state it as background in a peer-reviewed journal.
Any number you have read for this forest is probably not what you think it is. Japan counts suicides two ways, and the Ministry of Health, Labour and Welfare says plainly why they differ: police statistics count where a body was found, vital statistics count where the person lived. For Yamanashi that is not a technicality but the whole picture. On the residence basis the prefecture's 2022 rate was 16.8, below the national 17.4. On the discovery basis it was 24.8, the highest in Japan. The prefecture's own plan explains the gap without euphemism: in 2022, of the people found in Yamanashi, 137 lived there and 62 — about 30 % — came from outside or could not be identified. Yamanashi consequently sets two separate targets, one of which is to reduce the number of people who cross a prefectural boundary to die inside it. No official source we could find publishes a figure for Aokigahara specifically, and the prefecture's stated policy of dispelling the "famous suicide spot" image suggests that is deliberate. Treat every site-specific number in circulation as unsourced.
And a note on what this page does. The WHO's 2023 guidance for media professionals is blunt: don't name or give details about the site, don't use images of it, don't sensationalise, don't overplay the number of incidents, do give accurate information about where to get help. An entry about a named place cannot honour the first and remain an entry about that place. It can honour the rest — which is why this file prints no method, no death count, no personal case, and only figures for people helped.
Can you visit Aokigahara?
Aokigahara is a public forest and visiting it is entirely ordinary. It is also a Special Protection Zone — the strictest category of Fuji-Hakone-Izu National Park — and a National Natural Monument, so the rules are firmer than for most walks.
Do not leave the boardwalk. This is not atmosphere; it is prohibited. The prefecture's visitor booklet gives both reasons in one sentence: "there is a danger of catching your foot in lava holes hidden by fallen leaves and falling", and "from the standpoint of environmental protection, leaving the trail and entering is prohibited". The official eco-tour guideline, in force since 2004, tells participants to "never leave the routes designated in these guidelines" and names them: the Shōji-guchi trail, the maintained boardwalks including the Tōkai Nature Trail, and the forest roads. It caps groups at 20–25 people with about one guide per ten, asks walkers to go single file, and bans marking trees with tape or paint absolutely. Anything beyond those routes needs a permit from the prefecture's Fuji-Tōbu forestry office. Also posted: no fires, no collecting plants, no damaging moss or rock.
The two show caves are lava tubes from the same flow. Fugaku Wind Cave is 201 m long and averages about 3 °C; Narusawa Ice Cave is 153 m and also averages about 3 °C. Both charge ¥350 for adults and ¥200 for children, and both open at 09:00, closing at 17:00 from 1 April to 15 October, 16:30 to 15 November and 16:00 through the winter, with seasonal variations posted by the operator. The wind cave worked as a natural refrigerator for silkworm eggs, cocoons and seeds until around 1955. Ceilings are low in places and footing is slippery: the prefecture recommends wearing a helmet, but the operator does not state whether one is lent, so ask at the entrance. Parking at both is free.
Getting there. From Kawaguchiko Station it is about 30 minutes by local bus to the Fūketsu or Hyōketsu stops on the Kawaguchiko–Motosu route; by car, around 20 minutes from the Kawaguchiko interchange. Go in daylight, in shoes you have already walked in — the lava underfoot is sharp and uneven.
A point of World Heritage pedantry worth having right. Mount Fuji was inscribed in 2013 with 25 constituent assets, and the two famous caves are not among them; they are National Natural Monuments instead. What is inscribed nearby are the three lakes this flow made or bounded — Sai, Shōji and Motosu — and the Funatsu and Yoshida lava tree moulds, assets 21 and 22.
One thing you may not do here. Yamanashi Prefecture does not permit entry for the purpose of filming films, television programmes or streamed video that risk encouraging suicide, and the prefectural film commission will not support such shoots on prefectural land. That is standing written policy, published in the network conference's handbook and restated in the 2024–2028 prefectural plan.
If you are struggling, or worried about someone, these lines were checked against their operators' own pages.Spain — 024. The Ministry of Health describes it as "a service of national scope (accessible from the whole national territory), free, confidential and available 24 hours a day, 365 days a year", for people with suicidal thoughts and for their families and friends. There is also an online chat.
Japan — #いのちSOS, 0120-061-338, listed by the Ministry of Health, Labour and Welfare as free and open 24 hours, 365 days. The ministry also lists the Kokoro no Kenkō Sōdan Tōitsu Daiyaru on 0570-064-556, whose hours vary by prefecture. Both appear in the handbook the local network gives to people living and working around the forest.
Japan, in English — TELL Lifeline, 0800-300-8355, toll free, described by TELL as open and free to everyone in Japan who speaks English. Phone hours run continuously from Saturday 09:00 to Monday 23:00, then 09:00–23:00 Tuesday to Thursday and 09:00–02:00 on Friday; a chat service opens daily at 16:00.
Most countries have an equivalent free line. It is worth knowing the number before you need it.
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