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Usage guidance

Seiwa Plateau Astronomical Observatory

Seiwa Plateau Astronomical Observatory is located at an altitude of 700m, where the air is clear and the stars are visible.
It is a fantastic location, with views of Mt Aso to the north and the 1,000m-high Kyushu Mountain Range to the south.
You can relax on the grassland during the day and enjoy the starry sky at night.
  • Opening hours, closed days, calendar

    • ★★★

      【Opening hours】
      From 14:00 to 22:00
       Note: The museum will be closed on nights when observation is not possible due to bad weather.

      【closing day】

      【Upon arrival】
      ・We ask for your cooperation in preventing the spread of the new coronavirus.
      ・Please prepare warm clothes as the night of the Seiwa Plateau cools down even in summer.           
       Be sure to bring warm clothes in winter.
      ・In winter, please come with winter tires on your car.
      ・Please be careful as deer and wild boars may jump out on the road to the observatory.
      ・If you are visiting for the first time, please contact the observatory for directions or visit the access page.Please note that the car navigation system may guide you to a different route.
      ・A facility surrounded by nature.Please be careful about weather, insects, birds and animals, and car movement.
  • ☆About the astronomical observation event

     Seiwa Plateau Astronomical Observatory holds astronomical observation events every day except on closed days (Tuesdays).
     Using the 50cm Newton-style reflecting telescope installed in the observation room on the second floor, staff members such as "star sommeliers" will guide you through the celestial bodies that change with the seasons.

    ☆Please make a reservation by phone or email (at least 2 days in advance).
    • Stargazing with a large telescope! If you're lucky, you might even see a shooting star!


      【Estimated start time of the observation session】 
      ★Spring Autumn 19:30 to 22:00
      ★ Summer 20: 00-22: 00
      ★ Winter 19:00 to 22:00 
      *The start time varies depending on the season.Detailed times will be announced in the "Announcement" section.
      *It may be canceled depending on the weather.
      *Observation with infants is dangerous, so please contact us in advance.
      【Capacity / time required per session】20 people/40 to 50 minutes
      【Reservation required.】
      *Please apply by phone or email (see "Reservation Method").
       Please make a reservation by email at least 2 days in advance.
      *We give priority to guests and close the deadline as soon as the capacity is reached.
      *If you wish to cancel your reservation, please contact us by 5pm on the day of your reservation.
  • School and group tours

    We also accommodate daytime events for schools and groups, such as field trips and club activities.
    We offer solar observations, workshops, and starry sky commentary using simulation software.
    Please contact us by email or phone.
    • ★★★

      【Tour Menu(Example)】
      ・Stargazing with a simulator(20 minutes)
      ・Large telescope visit(20 minutes)
      ・Solar glass making and solar observation(Half an hour)

      【Visit fee】
      It depends on the age of the participants and the tour contents.Please contact us in advance.

      ・Please apply in advance.
      ・See "How to make a reservation" below.
  • Workshops/Rentals

    Seiwa Plateau Astronomical Observatory workshop is held at the Seiwa Plateau Astronomical Observatory.
    Why not give it a try when you visit Seiwa Plateau?
    We are accepting anytime from lunch time to evening.We accept orders by e-mail, telephone, and reception counter.
    *We may not be able to provide information during busy seasons.
    • ★Solar Observation Glass Making Workshop

      Directly observing the sun is very dangerous.
      Why don't you observe the sun by using a film that allows you to see the sun safely?
      After completion, decorate with color pens and stickers.Let's finish with the original sun glass.

      【Content】Sun glass work and sun observation
      【Material cost】300 JPY
      【Time】About 30 minutes

    • ★Constellation Hayami board making workshop

      I would like to accompany you to the starry sky observation. "Constellation quick board"
      You can check which constellation the star is in front of by adjusting the date, time and direction.
      Why don't you make it by hand using a work kit?

      【Content】Constellation quick board making
      【Material cost】300 JPY
      【Time】About 30 minutes
      *Please contact us in advance as we may not be able to accommodate some days.
    • ★Kite making and kite raising workshop

      Just assemble a simple kite kit called a diamond kite.
      Why don't you draw a picture of a star or a picture of Amabie on the front of the kite in hopes of the corona escaping, or make your own original kite?

       "Contents" Original kite making and kite raising
       "Material fee" 300 yen
       "Time" about 30 minutes

    • Information on rental items

      We rent observation equipment.
      ◆small binoculars
      ◆field scope
      ◆recliner chair
      ◆home planetarium(*Guests only)

      Fare:500 yen each
      Time:2 hours
  • How to make a reservation

    • Please fill in the following contents and apply from the email address below the top page.

      ◆For observation / event reservation
      【Preferred date】
      【Desired time】  Hour
      【Your name / Kana】
      【Contact TEL】
      【Contact email address】
      【The number of participants】  Man(High school students and above Man/Elementary and junior high school students Man/Preschooler)
      *Please make an observation reservation at least 2 days in advance.

      ◆For group tour reservations
      【Preferred date】
      【Desired time】  Hours to hours
      【Group name / school name】
      【Representative name and kana】
      【Contact TEL】
      【Contact email address】
      【The number of participants】  Man(student Man,Leader)
      【Desired tour menu】
      *Please contact us in advance.

      ◆For workshop
      【Workshop name】Making sun glasses/Constellation quick board making/Handmade kite flying experience
      【Preferred date】
      【Desired time】  Hour
      【Your name / Kana】
      【Contact TEL】
      【Contact email address】
      【The number of participants】  Man(High school students and above Man/Elementary and junior high school students Man/Preschooler)