Dr. Takeda’s current research is in the area of electronic materials including piezoelectric single crystals for high temperature pressure sensor and bio-sensing applications, and growth technology of mixed crystals with homogenous composition and lithium ion-conducting oxides.

B.S. Degree for Science at Kanazawa University, 1992
M.S. Degree for Science at Kanazawa University, 1995
Ph.D. Degree for Science at Tohoku University, 1998

Post doctor Research Fellow, Tohoku University, 1998
Post doctor Research Fellow, Tokyo Medical and Dental University, 1999
Research Assistant, Nara Institute of Science and Technology, 2000-2006
Research Associate, Nara Institute of Science and Technology, 2007
(Visiting Researcher, University of Manchester, Manchester, UK, 2007)
Associate Professor, Tokyo Institute of Technology, 2008-2019
(Visiting Professor, Universite de Lyon 1, France, 2016–2017)          
Professor (P.I), Saitama University, 2020-present

Inorganic Chemistry I
Exercise of Inorganic Chemistry
Inorganic Solid-State Chemistry
Advanced Inorganic Solid-State Chemistry (MC)
Advanced Course of Crystals Science and Technology (DC)

2015 Richard M. Fulrath Award, The American Ceramic Society
2021 CerSJ Awards for academic achievements in ceramic science and technology, The Ceramic Society of Japan
2022 Japanese Journal of Applied Physics: 2021 Outstanding Reviewer Awards, IOP publishing
2022 President's Encouragement Award (Research), Saitama University

1. H Takeda et al., “Effect of strontium substitution on growth and piezoelectric properties of calcium magnesium silicate Ca2MgSi2O7 single crystals”, Japanese Journal of Applied Physics, 62, SM1027 (2023).
2. H Takeda et al., “Growth and characterization of strontium-substituted La3Ta0.5Ga5.5O14 single crystals”, Journal of the Ceramic Society of Japan, 130, 16–20 (2022).
3. H Takeda et al., “Strontium-substituted calcium magnesium silicate single crystals for high-temperature piezoelectric applications”, Journal of the Ceramic Society of Japan, 128, 130–134 (2020).
4. H Takeda et al., “Electro-acoustical constants and Rayleigh surface acoustic wave propagation characteristics of calcium aluminate silicate Ca2Al2SiO7 single crystals”, Japanese Journal of Applied Physics, 57, 11UD01 (2018) .
5. H Takeda et al., “Growth and characterization of strontium-substituted Ca2Al2SiO7 piezoelectric single crystals”, Journal of the Ceramic Society of Japan, 125, 23–26 (2017).
6. H Takeda et al., “Effect of aluminum substitution on structure and electric properties of langasite family crystals”, Crystal Research and Technology, 50, 944–949 (2015).
7. H Takeda et al., “Calcium aluminate silicate Ca2Al2SiO7 single crystal applicable to piezoelectric sensors at high temperature”, Applied Physics Letters, 102, 242907 (2013).
8. H Takeda et al., “Effect of Material Constants on Power Output in Piezoelectric Vibration Based Generator”, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 58, 1852–1859 (2011).
9. H Takeda et al., “Cation distribution and piezoelectric properties of aluminum substituted La3Ta0.5Ga5.5O14 single crystals”, Journal of the Ceramic Society of Japan, 118, 706–710 (2010).
10. H Takeda et al., “Growth and Piezoelectric Properties of Ferroelectric Bi2WO6 Mono-domain Crystals”, Solid State Communications, 150, 836–839 (2010).
11. H Takeda et al., “Fabrication and positive temperature coefficient of resistivity properties of semiconducting ceramics based on the BaTiO3-(Bi1/2K1/2)TiO3 system”, Journal of the European Ceramic Society, 30, 555–559 (2010).