Altitude sickness at the 5th Station and above
What the numbers mean in practice
From my years at the information desk: headaches, queasiness and fatigue walk past from mid-trail onwards, mostly in people who rode a bus from sea level and started climbing within the half hour. The fix costs nothing — arrive, then wait. An hour or two at the station before the trail is the whole trick, and it is why the station’s hour is built into every sensible climbing plan on the climbing page.
If you are only visiting the station
Most bus visitors feel at most a little light-headed at 2,305 m. Walk slowly for the first while, drink water, and skip nothing on the itinerary. Dressing warmly helps more than people expect — cold and altitude compound each other, and the layers page covers the arithmetic.
Standing at altitude without the climb
The bus loops go to 2,305 m and no higher, which for altitude purposes is the gentle version of the mountain. The flagship loop at $151 gives the station about an hour — conveniently, the same hour the acclimatisation advice asks for.
Frequently asked questions
How common is altitude sickness on Mount Fuji?
About 30% of climbers report at least mild symptoms — headache, nausea, fatigue — mostly above the 5th Station. The hour-or-two pause at the station before climbing is the standard prevention — the full climbing brief.
Do you need oxygen to climb Mount Fuji?
No — the summit air carries roughly two-thirds of sea-level oxygen, which fit climbers manage with pacing and acclimatisation. Small canned oxygen is sold as a comfort, not a requirement. Pacing starts with the station hour.
Will I feel the altitude on a bus tour to the 5th Station?
Usually just mild breathlessness on stairs at 2,305 m, if anything. Walk slowly at first and carry a warm layer, since cold makes everything feel worse — what to wear up there.