Researchers

TASAKA Koji

TASAKA Koji
Associate Professor
Faculty Department of Science / Graduate School of Science and Engineering
Researchmap https://researchmap.jp/kojitasaka

Education and Career

Education

  • 2005/04 - 2009/03 , Kinki University, Department of Mathematics,
  • 2009/04 - 2011/03 , Kyushu University, Graduate School of Mathematics,
  • 2011/04 - 2014/03 , Kyushu University, Graduate School of Mathematics,

Academic & Professional Experience

  • Apr. 2024 , Kindai University Department of Mathematics Associate Professor
  • Apr. 2020 - Mar. 2024 , Aichi Prefectural University School of Information Science and Technology 准教授
  • Apr. 2018 - Mar. 2020 , Aichi Prefectural University School of Information Science and Technology Lecturer
  • Apr. 2016 - Mar. 2018 , Aichi Prefectural University School of Information Science and Technology Assictant professor
  • Apr. 2017 - Feb. 2018 , Max Planck Institute for Mathematics Guest Scientist
  • Apr. 2015 - Mar. 2016 , Nagoya University Graduate School of Mathematics Research Fellow of the Japan Society for the Promotion of Science (JSPS Research Fellow)
  • Jul. 2014 - Mar. 2015 , POSTECH Pohang Mathematical Institute 学術研究員
  • Apr. 2014 - May. 2014 , Kyushu University 大学院数理学研究院 博士研究員
  • Apr. 2012 - Mar. 2014 , Kyushu University Graduate School of Mathematics Research Fellow of the Japan Society for the Promotion of Science (JSPS Research Fellow)

Research Activities

Research Areas

  • Natural sciences , Algebra

Research Interests

Spherical design, Modular Forms, Multiple zeta value, Number Theory

Published Papers

  1. Spherical designs for finite quaternionic unit groups and their applications to modular forms
    Masatake Hirao; Hiroshi Nozaki; Koji Tasaka
    Algebraic Combinatorics  2026  , Refereed
  2. The ring of finite algebraic numbers and its application to the law of decomposition of primes
    Julian Rosen; Yoshihiro Takeyama; Koji Tasaka; Shuji Yamamoto
    Journal of Number Theory  263  , 335-365, Oct. 2024  , Refereed
  3. Spherical designs and modular forms of the $$D_4$$ lattice
    Masatake Hirao; Hiroshi Nozaki; Koji Tasaka
    Research in Number Theory  9  (4)  1, Nov. 2023  , Refereed

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Conference Activities & Talks

  1. P-recursive sequences in poor man’s Adele ring for modular forms and Apéry limits , Koji Tasaka , NCTS Number Theory Seminar , 24, Apr. 2026
  2. FAN of recurrent sequences , Koji Tasaka , Meeting in the Middle: Conference on characteristic 0 and characteristic p multiple zeta values, University of Hawaii at Manoa (US) , 19, Mar. 2026
  3. Linear shuffle relations and related topics , Koji Tasaka , Japan-India Workshop on L-functions and multiple zeta functions, Sophia University (Japan) , 3, Mar. 2026

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MISC

  1. Catalogue of modular relations for double zeta values , Koji Tasaka , RIMS Kokyuroku "Zeta functions and their representations" , 2267 , 100 , 121 , Nov. 2023
  2. The harmonic strength of shells of lattices and weighted theta series , Koji Tasaka , RIMS Kokyuroku "Analytic and arithmetic aspects of automorphic representations" , 2264 , 17 , 29 , Aug. 2023
  3. 2重 Eisenstein 級数とその周辺 (解析的整数論 : 数論的関数の多重性に関連して) , 田坂 浩二 , 数理解析研究所講究録 , 1806 , 200 , 209 , Sep. 2012

Awards & Honors

  1. Feb. 2014, 日本数学会九州支部, 九州若手数学賞

Research Grants & Projects

  1. Daiwa Anglo-Japan Foundation, Daiwa Foundation Small Grants, apan-UK collaboration on various aspects on period polynomials ranging from mathematics to mathematical physics , Kindai University
  2. Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The dawn of modular phenomena for higher level multiple zeta values with a new development on multiple Eisenstein series , Aichi Prefectural University
  3. 観光庁, 大学における国際会議誘致開催促進事業 類型2, 多重ゼータ値とモジュラー形式に携わる研究者の国際的なネットワーク形成促進と若手主体の国際シンポジウムの新規立ち上げ

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