- 2011 - 2016 High sensitive searches for the non-thermal emission from white dwarfs to verify a new Cosmic-ray origin
- 2002 - 2006 精密X線ドップラー分光で探るブラックホールのダイナミクス
- 2001 - 2003 Development of microcalorimeters for observing large-scale motion in the universe
- 2000 - 2003 Stury of interstellar and intergalactic media based on X-ray line spectra
- 1996 - 1998 X-ray Astronomy Study with the ASCA Satellite
- 1996 - 1996 ラインX線による宇宙高温プラズマの観測的研究
- 1995 - 1996 Investigation of X-ray Objects with Astro-D and ROSAT
- 1992 - 1994 X-Ray Astronomy Study with the Astro-D Satellite
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