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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Official booking link attached2 official linksVerified 2026-05-26
$230/ night est.
Official site

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$230 / night est.Official site
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Photos & planning

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Grand Mercure Yatsugatake Resort & Spa under the night sky
Stay photo

Grand Mercure Yatsugatake Resort & Spa photo

Rights-cleared property imagery attached to this Stella stay.

Sky program

Observatory Stay

nightly program. 12 in maximum aperture from current source evidence or Stella estimate.

Map context

Yamanashi, JP

35.8950deg N / 138.3600deg E. 3 nearby dark-sky places found in Stella.

Booking path

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Official hotel details are attached.

Before you book

Official hotel details are attached.

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Open the linked site for current dates, rates, and astronomy-program details.
Details from
Official hotel site
Last verified
2026-05-26
Ready to book

Check availability on the official site.

Stella has enough direct booking and astronomy-program evidence for this to behave like a normal stay shortlist.

  1. Open the official booking page.
  2. Choose dates around the darkest Moon window.
  3. Save the stay to a Trip Board before comparing final options.

Ask before booking

  • Which nights have guided telescope access or astronomy staff?
  • Which room, deck, or dinner setup has the best open-sky view?
  • What happens if clouds cancel the observing session?
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Official links

2 website links attached for trip planning.

Details linked2 official links
  • Hotel websitegrand-mercure-yatsugatake-resortandspa.jp
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  • Hotel websitegrand-mercure-yatsugatake-resortandspa.jp
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  • Booking linkgrand-mercure-yatsugatake-resortandspa.jp
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Observing Fit

Telescope setup
12 in maximum aperture from current source evidence or Stella estimate.
Astronomy guide
Ask the property
Category
Observatory Stay
Stay style
stella prime

Good to know

Booking status
Ready to book
Sky estimate
verify
Last verified
2026-05-26
Stella note
Japan listed stay; official facilities page confirms SoRa Deck, astronomical dome, and scheduled starry-sky viewing.

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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

Next steps

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