2010 年 20 巻 3 号 p. 212-222
I was awarded a prize by The Japanese Society for Neutron Science at 2009. The main topic of the title is the contribution to the structural science using neutron and x-ray. Special emphasis was adopted for the development of instrumentations. In this paper, the idea of structural science is given, and the importance of the crystal and magnetic structures for material properties will be discussed. Starting from my personal history for development of instrumentations on diffraction studies, I will touch the scientific results. At the last part, future development on this field will be overlooked.