Observatory Stay

Grand Mercure Yatsugatake Resort & Spa

Yamanashi, JP. Bortle 3 sky, nightly programming, and astronomy-forward stay context.

Telescope TrailPart of the Yatsugatake/Nobeyama hotel cluster where telescope-led programs are the main draw.
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1 stay - Ready for offline
$230/ night est.
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Guests
2
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Trust & Evidence

Strong property evidence

Status
Bookable Now
Next proof
Evidence is sufficient for a booking-forward Stella Stay card.
Source
Official Property
Last verified
2026-05-26

Source Evidence

2 tracked source URLs attached.

Source-linked2 sources attached
  • Property sourcegrand-mercure-yatsugatake-resortandspa.jp
    Open source
  • Property sourcegrand-mercure-yatsugatake-resortandspa.jp
    Open source
  • Booking sourcegrand-mercure-yatsugatake-resortandspa.jp
    Open source

Observing Fit

Telescope inventory
12 in maximum aperture from current source evidence or Stella launch estimate.
Resident astronomer
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Category
Observatory Stay
Tier
stella prime

Planning Notes

Booking confidence
Bookable Now
Bortle confidence
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Last verified
2026-05-26
Verification note
Japan launch card; official facilities page confirms SoRa Deck, astronomical dome, and scheduled starry-sky viewing.
Highlights3
  • Yatsugatake SoRa Deck and astronomical dome
  • Nightly starry-sky viewing party in official facilities copy
  • Backup seasonal star slide show in poor weather

The sky during your stay

What you can expect overhead at Grand Mercure Yatsugatake Resort & Spa through the year — Moon phases and eclipses are exact dates; the Milky Way and aurora are seasonal likelihoods. Pick a month to plan around it.

Dark window Milky Way Meteors Eclipse★ Best months to visit

August 2026 · recommended

Dark-sky parks & sites near here

Certified parks, reserves, and observing sites within reach of this stay.

On the map