IKI Kiyotaka

Department of Liberal Arts and ScienceAssociate Professor

Field Of Study

  • Natural sciences, Applied mathematics and statistics
  • Informatics, Statistical science, Statistical science

Career

  • Apr. 2021 - Present
    日本大学, 経済学部, 准教授
  • Apr. 2018 - Mar. 2021
    日本大学, 経済学部, 専任講師
  • Sep. 2018 - Mar. 2019
    東京理科大学, 理工学部, 非常勤講師
  • Apr. 2013 - Mar. 2018
    東京理科大学, 理工学部, 助教

Educational Background

  • Apr. 2010 - Mar. 2013
    東京理科大学, 理工学研究科
  • Apr. 2008 - Mar. 2010
    東京理科大学, 理工学研究科

Member History

  • Mar. 2021 - Present
    広報委員, 統計関連学会連合
  • Jun. 2020 - Jun. 2022
    庶務理事, Japanese Society of Applied Statistics
  • Jun. 2019 - Jun. 2021
    庶務, 日本統計学会
  • Nov. 2016 - May 2017
    第31回大会実行委員, 日本計算機統計学会

Paper

  • ★Measure of departure from point-symmetry for the analysis of collapsed square contingency tables.
    Iki; K.; Yamamoto; K. and Tomizawa S.
    Open Journal of Statistics, 2021, Refereed, Not invited
    Lead
  • An index for the degree and directionality of asymmetry for square contingency tables with ordered categories.
    Momozaki; T.; Nakagawa; T.; Iki; K. and Tomizawa; S.
    Austrian Journal of Statistics, 2023, Refereed, Not invited
  • Analysis of stock prices using symmetry models for multi-way contingency tables.
    Iki; K.
    日本大学経済学部経済科学研究所『紀要』, 2022, Refereed, Not invited
    Lead
  • Parsimonious bivariate t-distribution type symmetry models for square contingency tables.
    Iki; K. and Tomizawa; S.
    International Journal of Statistics and Probability, 2022, Refereed, Not invited
    Lead
  • 正方分割表解析に関する潜在分布に基づく対称性のモデル.
    生亀清貴
    日本数学会誌「数学」, 2022, Refereed, Invited
    Lead
  • Measure of departure from marginal point-symmetry for multi-way contingency tables.
    Saito; K.; Ishii; A.; Iki; K. and Tomizawa; S.
    SUT Journal of Mathematics, 2022, Refereed, Not invited
  • Improved approximate unbiased estimators of the measure of departure from partial symmetry for square contingency tables.
    Nakagawa; T.; Namba; R.; Iki; K. and Tomizawa; S.
    SUT Journal of Mathematics, 2021, Refereed, Not invited
  • Measure of departure from point symmetry and decomposition of measure for square contingency tables.
    Iki; K. and Tomizawa; S.
    Journal of Statistical Theory and Applications, Dec. 2020, Refereed, Not invited
    Corresponding
  • Extended marginal homogeneity based on complementary log-log transform for multi-way tables.
    Shinoda; S.; Tahata; K.; Iki; K. and Tomizawa; S.
    SUT Journal of Mathematics, 2019, Refereed, Not invited
  • Moment symmetry models decompositions of symmetry for multi-way tables.
    Yoshimoto; T.; Tahata; K.; Iki; K. and Tomizawa; S.
    Calcutta Statistical Association Bulletin, 2019, Refereed, Not invited
  • Directional measure for marginal homogeneity in square contingency tables with ordered categories.
    Iki; K.; Nakano; H. and Tomizawa; S.
    Biometrical Letters, 2019, Refereed, Not invited
    Lead
  • Generalized diagonal exponent conditional symmetry models for square contingency tables with ordered categories.
    Iki; K.; Nemoto; D. and Tomizawa; S.
    Journal of Statistics: Advances in Theory and Applications, 2019, Refereed, Not invited
    Lead
  • Two-dimensional measure vector of departure from marginal homogeneity in square contingency tables.
    Ando; S.; Takeuchi; T.; Iki; K. and Tomizawa; S.
    Journal of Advanced Statistics, 2019, Refereed, Not invited
  • Double symmetric multivariate density function and its decomposition.
    Iki; K. and Tomizawa; S.
    Journal of Statistics Applications and Probability, 2018, Refereed, Not invited
    Lead
  • An extended bivariate t-distribution type symmetry model for square contingency tables.
    Iki; K.; Okada; M. and Tomizawa; S.
    Open Jornal of Statistics, 2018, Refereed, Not invited
    Lead
  • Decomposition of Parsimonious Independence Model Using Pearson, Kendall and Spearman's Correlations for Two-Way Contingency Tables.
    Iki; K.; Sato; S. and Tomizawa; S.
    International Journal of Statistics and Probability, 2018, Refereed, Not invited
    Lead
  • Log-normal distribution type symmetry model for square contingency tables with ordered categories.
    Iki; K. and Tomizawa; S.
    Austrian Journal of Statistics, 2018, Refereed, Not invited
    Lead
  • Measure of departure from symmetry using cumulative probability for sqaure contingency tables with ordered categories.
    Iki; K. and Tomizawa; S.
    Advances and Applications in Statistics, 2018, Refereed, Not invited
    Lead
  • Decomposition of diamond model for square contingency tables with ordered categories.
    Iki; K.
    SUT Journal of Mathematics, 2018, Refereed, Not invited
    Lead
  • Measure of departure from marginal average point-symmetry for two-way contingency tables.
    Iki; K. and Tomizawa; S.
    Journal of Modern Applied Statistical Methods, 2018, Refereed, Not invited
    Lead
  • Improved estimator of measure for marginal homogeneity using marginal odds in square contingency tables.
    Iki; K. and Tomizawa; S.
    Journal of Advanced Statistics, 2017, Refereed, Not invited
    Lead
  • Diagonal exponent conditional symmetry model for square contingency tables with ordered categories.
    Iki; K.; Shibuya; A. and Tomizawa; S.
    International Journal of Statistics and Probability, 2016, Refereed, Not invited
    Lead
  • Measure of departure from point-symmetry for two-way contingency tables with ordered categories.
    Iki; K.
    European Journal of Statistics and Probability, 2016, Refereed, Not invited
    Lead
  • Analysis of the grip strength data using anti-diagonal symmetry models.
    Iki; K.
    Open Journal of Statistics, 2016, Refereed, Not invited
    Lead
  • A generalized asymmetry model for square contingency tables with ordered categories.
    Iki; K.; Suto; T. and Tomizawa; S.
    Journal of Statistical Theory and Applications, 2016, Refereed, Not invited
    Lead
  • Extended diagonal exponent symmetry model and its orthogonal decomposition in square contingency tables with ordered categories.
    Iki; K.; Shibuya; A. and Tomizawa; S.
    Open Journal of Statistics, 2015, Refereed, Not invited
    Lead
  • Test and measure on difference of marginal homogeneity between several square contingency tables.
    Iki; K. and Yamasaki; S.
    International Journal of Applied Mathematics and Statistics, 2015, Refereed, Not invited
    Lead
  • Generalized diagonal exponent symmetry model and its orthogonal decomposition for square contingency tables with ordered categories.
    Iki; K.; Shibuya; A. and Tomizawa; S.
    Journal of Statistics: Advances in Theory and Applications, 2015, Refereed, Not invited
    Lead
  • Quasi-diagonal exponent symmetry model for square contingency tables with ordered categories
    Kiyotaka Iki; Kouji Yamamoto; Sadao Tomizawa
    STATISTICS & PROBABILITY LETTERS, Sep. 2014, Refereed, Not invited
  • Point-symmetric multivariate density function and its decomposition.
    Iki; K. and Tomizawa; S.
    Journal of Probability and Statistics, 2014, Refereed, Not invited
    Lead
  • A modified palindromic symmetry model for square contingency tables with ordered categories.
    Iki; K.; Oda; T. and Tomizawa; S.
    Journal of Statistics Applications and Probability, 2014, Refereed, Not invited
    Lead
  • Orthogonal decomposition of quasi-independence and symmetry models for incomplete 2 * 2 * 2 contingency tables.
    Iki; K. and Tomizawa; S.
    Journal of Statistics and Applications, 2013, Refereed, Not invited
    Lead
  • Bivariate t-distribution type symmetry model for square contingency tables with ordered categories
    Kiyotaka Iki; Takuma Ishihara; Sadao Tomizawa
    Model Assisted Statistics and Applications, 2013, Refereed, Not invited
  • Measure of departure from marginal homogeneity using marginal odds for multi-way tables with ordered categories
    Kiyotaka Iki; Kouji Tahata; Sadao Tomizawa
    JOURNAL OF APPLIED STATISTICS, 2012, Refereed, Not invited
  • On quasi-symmetry based on ridit for analysis of square contingency tables.
    Iki; K.; Tahata; K. and Tomizawa; S.
    Journal of Statistical Theory and Applications, 2012, Refereed, Not invited
    Lead
  • Kullback-Leibler information type measure from marginal cumulative logistic model in a two-way classification.
    Iki; K. and Tomizawa; S.
    Biostatistics, Bioinformatics and Biomathematics, 2012, Refereed, Not invited
    Lead
  • Decomposition of symmetric multivariate density function.
    Iki; K.; Tahata; K. and Tomizawa; S.
    SUT Journal of Mathematics, 2012, Refereed, Not invited
    Lead
  • On partitioning conditional independence model for three-way contingency tables
    Kiyotaka Iki; Kouji Tahata; Sadao Tomizawa
    Model Assisted Statistics and Applications, 2011, Refereed, Not invited
  • Decomposition of Marginal Homogeneity into logit and mean ridits equality for square contingency tables
    Kiyotaka Iki; Kouji Tahata; Sadao Tomizawa
    Journal of Mathematics and Statistics, 2010, Refereed, Not invited
  • Ridit score type quasi-symmetry and decomposition of symmetry for square contingency tables with ordered categories.
    Iki; K.; Tahata; K. and Tomizawa; S.
    Austrian Journal of Statistics, 2009, Refereed, Not invited
    Lead

Books and other publications

  • 統計応用の百科事典
    Joint translation
    丸善出版, Oct. 2011, Not refereed

Lectures, oral presentations, etc.

  • 正方分割表における潜在分布に基づく対称性のモデル.
    生亀清貴
    日本数学会, Mar. 2019, Invited

Affiliated academic society

  • 日本分類学会
  • 日本行動計量学会
  • 日本計算機統計学会
  • 日本計量生物学会
  • 応用統計学会
  • 日本統計学会
  • 日本数学会