I have been working on observational study of supernova remnants. A supernova remnant is a structure remained after the explosion of a star and the remnant emits X-rays in the evolution process. I study how supernova remnants evolve in a long time such as several ten thousand years using X-ray observations. Recently, I work on development of a new model taking a time evolution of plasma into consideration.

I have also been developing hard X-ray/gamma-ray detectors using CdTe devices. Our CdTe detectors have high energy and position resolutions because of a severe required condition in the universe. Since our high performance devices are profitable in other fields of accelerator experiment and nuclear medicine, we research applications of our detectors to other fields recently.