* Planetary Formation

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  (1). Protoplanetary Disks
   　　　The Evolution of Protoplanetary Disks
  (2). From Dust to Protoplanets
  　　　 From Dust to Planetesimals
  　　　 From Planetesimals to Protoplanets
  (3). Planetary Formation and Evolution
  　　 　Terrestrial Planetes and Gas Giants

* Observational and Theoretical Studies of Extrasolar Planets

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  (1). Theoretical Studies
   　　　A Theory of the Formation of Extrasolar Planets
  (2). Observational Studies
   　　　Doppler Method and Transit Method:
  　　　 ・A reflecting 188 cm Telescope in Okayama, Japan
  　　　 ・SUBARU Telescope in Hawaii, U.S.

* Satellites and Rings

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  (1). Satellites Formation and Evolution
   　　　Satellites of Jupiter, Saturn, Uranus and Neptune
   　　　Satellites of Extra Solar Planets
  (2). Ring Formation and Evolution
   　　　Rings of Jupiter and Saturn

※ We compare theoretical results with observational results.
※ We are working with a radio velocity observation group.