About Planetarhythm

Do you know the field of study called “planetary science”?  Like the name implies, they do research on planets. It's a field for learning about the planet Earth that we live on, the Solar System, and the planets outside of the Solar System. At Planetarhythm, we focus on research and achievements in “planetary science” and aim to provid you with an opportunity to use your “Kotowari(reasoning)” and get a rea “sensory experience.”

You can create your own planet with the planet generation simulator.

You can design a planet with your own hands and your own logic.
All births have underlying reasons. Plant the seed of a planet and go on a 30,000,000 year journey.

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This simulator is a machine that was built specifically for Planetarhythm and based on a cutting-edge simulation program that is being currently used in planetary science. They ventured to design a simpler program aimed at us scientists. From here on out, we plan on upgrading our version along with the real-world progression.

You may feel like you can't make a good planet but this is the same feeling that scientists in the field experience day in and day out. If you rack your brain, you can get a sense of achievement when you create a planet successfully.

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Produced by:

  • Masahiro Ogihara (Observatoire de la Côte d'Azur)
  • Yasunori Hori (Department of Astronomy & Astrophysics, University of California, Santa Cruz)
  • Hiroki Harakawa (National Astronomical Observatory of Japan)
  • Masanobu Kunitomo(Tokyo Institute of Technology)
  • Chihiro Tachinami
  • Tomoko Yokota
  • Ashita Miyamoto
  • Kenichi Ueno


  • Shigeru Ida (Tokyo Institute of Technology)
  • Masaki Fujimoto (ISAS/JAXA)

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