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Astronomical observation partyWe carry out every day.(Closed on Tuesdays)
*Currently, reservation is required.Be sure to make a reservation.
 It starts at 20:00.
*If there are many people making reservations, such as on weekends, we will split the reservation into multiple sessions.
*In order to avoid crowding, we are limiting the number of participants to 20 people at a time.
*The time may change depending on the weather.
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You can see different celestial bodies in each season!Please be sure to inquire about the weather at the observatory before coming.

Past calendar

  • March 2024

    Events will be added at a later date
  • February 2024

    【During the period】
    “Midwinter kotatsu club” in progress
    For more information, please check the announcement page.
  • January 2024

    【1 day】 New Year's Day Kanbokai
    The parking lot and lawn will be open to the public from 6:00 to 8:00 in the early morning.
    Enjoy the first sunrise of the new year.
    The expected time for the first sunrise of the year at the observatory is around 7:20.

    【Four days】 Maximum day of the Shibungid meteor shower
    One of the three major meteor showers, the Shibungid meteor shower, will reach its peak.
  • December 2023

    【15th day】 The Geminid meteor shower is at its peak

    【The 23rd】 The Ursa Minor meteor shower is at its peak
  • November 2023

    【The 13th】 Northern Taurus meteor shower maximum
    【18th】 Maximum Leonids meteor shower
  • October 2023

    【The 22nd】 Orionids meteor shower maximum

    【27th】 later month(13th night)

    【29th tomorrow morning】 partial lunar eclipse
    Part of the moon is hidden in the Earth's shadow
    The maximum eclipse will be around 5:14 tomorrow morning.
  • September 2023

    【29th】 Mid-Autumn Harvest Moon
    A moon viewing party will be held at the observatory.
    In addition to the full moon, you can enjoy Saturn and bright stars.
    On the day of the event, a special menu of zenzai and matcha sets will be sold by reservation.
    We look forward to your reservations and your visit.
    Moon viewing
    Event date:September 29, 2020(Friday)
     Time :From 19:30 to 21:30(Reception starts at 19:00)
    Participation fee:500 yen for high school students and above, 300 yen for elementary and junior high school students, free for preschoolers
    Reservation required.:We accept inquiries by phone or email.
           Phone number 0967-82-3300
           Email ymt-astroseiwa@town.yamato.kumamoto.jp
    Other:Zenzai/Matcha set (reservation required, first 30 people) Price: 600 yen
    Please feel free to contact us if you have any questions.
  • August 2023

    12th"Perseid meteor shower Kanbokai』\
    Date and time:Saturday, August 12, 2020, from 20:00 to 22:30
      *Canceled or shortened in case of bad weather  *The holding decision will be decided at noon on the day
    Venue:Seiwa Plateau Astronomical Observatory 
    Content:Astronomical observation (observation room,terrace),Starry sky commentary twice(Lawn open space),mini bazaar
    Participation fee:500 yen for adults, 300 yen for elementary and junior high school students
  • July 2023

    7th Tanabata
  • June 2023

    Venus shines in the western sky.
    【21 days】 summer solstice sunrise:around 5:10 sunset:Around 19:20
    【The 22nd】 Moon, Venus and Mars approach
  • May 2023

    5th Aquarius η (Eta) meteor shower peak
    Penumbral lunar eclipse around 2:00 a.m. on the 6th

    【During Golden Week】
    【Hotel guests only】Hand-made kite gifts for users with children
  • April 2023

    【The 23rd】 The Lyrid meteor shower reaches its peak in April.
  • March 2023

    【early March】
    Venus and Jupiter are very close in the western sky.
  • February 2023

    【Comet Zhitiev】
    The comet was discovered in March 2022 and will make its closest approach to Earth on February 2nd.
    In the future, we will move further and further away from the earth.
  • January 2023

    【first sunrise view】
    The parking lot and lawn will be open to the public from 6:00 to 8:00 in the early morning.
    Enjoy the first sunrise of the new year.
    The expected time for the first sunrise of the year at the observatory is around 7:20.

  • December 2022

    1st Mars closest approach
    It shines brightly among the winter constellations.

    14th Geminid meteor shower peak
    We are planning to extend our business hours on the day of the day.
  • November 2022

    【8th・Total Lunar Eclipse Observation】
     Open from 17:30 to 21:30
    Please see the notice column.
    【From the 7th Kotatsu Kanboukai】
     Details will be announced in the announcement column
  • September 2022

    The 10th(Saturday)
    Mid-Autumn Moon (15th night).
    Please enjoy the moon viewing.
  • August 2022

    11th(mountain day)
    Seiwa Plateau Star Watching