Materials Characterization Support Team

Principal Investigator

PI Name Daisuke Hashizume
Degree D.Sci.
Title Team Leader
Brief Resume
1997Tokyo Institute of Technology, PhD in Chemistry
1997Research Associate, Department of Applied Physics and Chemistry, Univ. of Electro-Communications
2002Research Scientist, Molecular Characterization Team, Advanced Development and Support Center, RIKEN
2011Senior Research Scientist, Materials Characterization Team, Advanced Technology Support Division, RIKEN
2013Unit Leader, Materials Characterization Support Unit, Supramolecular Chemistry Division, RIKEN Center for Emergent Matter Science
2018Team Leader, Materials Characterization Support Team, Supramolecular Chemistry Division, RIKEN Center for Emergent Matter Science (-present)


Our team provides research support by means of X-ray diffractometry, electron microscopy, and elemental analysis. In addition to supporting on the individual method, we propose multifaceted research support by combining these methods. To keep our supports at the highest quality in the world, we always update our knowledge and make training in our skills. We make tight and deep collaboration with researchers to achieve their scientific purposes and to propose new insights into the research from analytical point of view, in addition to providing routinely analysis. Furthermore, we explore and develop new measurement methods directed to more advanced and sophisticated analyses.

Research Fields

Structural Chemistry, Analytical Chemistry, Materials Science


X-ray crystal structure analysis
Electron microscopy
Chemical analysis


Visualization of chemical bonds by accurate X-ray analysis

Our team has investigated nature of molecules, which have unusual chemical bonds and show less stability, in the crystalline state by analyzing distribution of valence electrons derived from accurate and precise single crystal X-ray crystal structure analysis.

Conventional X-ray diffraction method clarifies arrangement of atoms in the crystalline state by modeling total electron density distribution using spherical atom (isolated atom) models. As widely recognized, the resulted structures give important information on the nature of molecules. However, valence density distribution, which plays critical roles in chemistry of molecule, is not included in the resulted models. For deeply understanding the nature and chemistry of the analyzed molecule, in particular, reactivity, charge separation, bonding mode and intermolecular interaction, the valence densities should be analyzed. In this study, the valence densities are analyzed by applying multipole models instead of the spherical atom models to gain much direct information on the electronic structure of molecules.


Distribution of 3d-electrons in Ni(II) complex and bonding electrons.
Licensed under CC BY 4.0.


Daisuke Hashizume

Team Leader hashi[at] R

Keiko Suzuki

Senior Technical Scientist

Manabu Hoshino

Research Scientist

Daishi Inoue

Expert Technician

Tomoka Kikitsu

Technical Staff I

Kiyohiro Adachi

Technical Staff I


  1. T. Okamoto, M. Mitani, C. P. Yu, C. Mitsui, M. Yamagishi, H. Ishii, G. Watanabe, S. Kumagai, D. Hashizume, S. Tanaka, M. Yano, T. Kushida, H. Sato, K. Sugimoto, T. Kato, and J. Takeya

    Alkyl-Substituted Selenium-Bridged V-Shaped Organic Semiconductors Exhibiting High Hole Mobility and Unusual Aggregation Behavior

    J. Am. Chem. Soc. 142, 14974 (2020)
  2. S. Takahashi, K. Nakaya, M. Frutos, A. Baceiredo, N. Saffon-Merceron, S. Massou, N. Nakata, D. Hashizume, V. Branchadell , and T. Kato

    Synthesis of a Stable N-Hetero-Rh-I-Metallacyclic Silanone

    Angew. Chem. Int. Ed. 59, 15937 (2020)
  3. T. Kajitani, K. Motokawa, A. Kosaka, Y. Shoji, R. Haruki, D. Hashizume, T. Hikima, M. Takata, K. Yazawa, K. Morishima, M. Shibayama, and T. Fukushima

    Chiral crystal-like droplets displaying unidirectional rotational sliding

    Nat. Mater. 18, 266 (2019)
  4. S. Park, S. W. Heo, W. Lee, D. Inoue, Z. Jiang, K. Yu, H. Jinno, D. Hashizume, M. Sekino, T. Yokota, K. Fukuda, K. Tajima, and T. Someya

    Self-powered ultra-flexible electronics via nano-grating-patterned organic photovoltaics

    Nature 561, 516 (2018)
  5. Y. Sohtome, G. Nakamura, A. Muranaka, D. Hashizume, S. Lectard, T. Tsuchimoto, M. Uchiyama, and M. Sodeoka

    Naked d-orbital in a centrochiral Ni(II) complex as a catalyst for asymmetric [3+2] cycloaddition

    Nat. Commun. 8, 14875 (2017)



2-1 Hirosawa, Wako, Saitama 351-0198 Japan