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Facility information

  • Seiwa Plateau Astronomical Observatory

    Aso Seiwa Plateau Astronomical Observatory is located in the south outer ring of Aso, and is located in Minashimachi Ina No Nagahara (commonly known as Seiwa Plateau), with a 360-degree view.
    There are few city lights and the air is clear, so you can enjoy a lot of starry sky.
    ・east longitude:131.06
    ・north latitude:32.44
  • Seiwa Kogen no Yado

    This lodge type accommodation is located on the west side of Seiwa Plateau Astronomical Observatory.(A total of 10 buildings)
    Why don't you stay overnight at Seiwa Kogen no Yado and play with the stars all night long?

    An accommodation plan with dinner and astronomical observation is also available.
  • Restaurant"Seiza no Mori (woods)"

    At restaurant Seiza no Mori (woods), super-sized yakiniku is a standard menu.
    It is served as dinner for in-house guests.

    Light snacks and coffee are also available.
    Please drop in when you come to Seiwa Plateau.
  • Walking path / lawn open space

    Seasonal wildflowers and wildflowers gently bloom on the walking path on the premises.
    You can enjoy day walks and cherry blossom viewing.
    We also accept event use on the lawn.
  • Seiwa Plateau Astronomical Observatory★Observation room

    The observation room of the observatory has a "sliding roof" type operation roof, so you can enjoy the starry sky almost all over the sky.

    The large telescope in the observation room is a Newton-style reflection telescope, and this telescope has been installed since its establishment.

    ・Focal length:2500mm(F5)
  • Seiwa Plateau Astronomical Observatory★Training room

    In the rainy weather, the training room will provide guidance on the starry sky using simulation software.

    In addition, we also hold daytime sun observations and workshops for schools and groups such as social studies tours and club activities in the training room.
  • Seiwa Plateau Astronomical Observatory★terrace

    The smartphone lunar surface photography using binoculars is on this terrace.
    In the daytime, you can overlook the Kyushu Mountains.
  • Seiwa Plateau Astronomical Observatory★Exhibition corner

    We are exhibiting donated telescopes, seasonal constellations, and astronomical photographs.
  • Seiwa Plateau Astronomical Observatory★Shop corner

    We sell astronomy books and miscellaneous goods.How about a memorial visit or a souvenir?

◆Other facilities◆


56 cars (free) (1st parking lot):26 units/2nd parking lot:30 units) 

Smoking corner

Observatory facility:2 places

Toilet for the disabled

Observatory facility:One place

vending machine

Observatory facility entrance:One place