An excess theorem for spherical 2-designs. - Hirotake Kurihara (Des. Codes Cryptogr., 2012)

A characterization of Q-polynomial association schemes. - Hirotake Kurihara; Hiroshi Nozaki (J. Comb. Theory A, 2012)

A Spectral Equivalent Condition of the P-polynomial Property for Association Schemes. - Hiroshi Nozaki; Hirotake Kurihara (Electron. J. Comb., 2014)

Antipodal Sets and Designs on Unitary Groups. - Hirotake Kurihara (Graphs Comb., 2021)

The least Euclidean distortion constant of a distance-regular graph. - Sebastian M. Cioaba; Himanshu Gupta; Ferdinand Ihringer; Hirotake Kurihara (Discret. Appl. Math., 2023)

Multivariate P- and/or Q-polynomial association schemes. - Eiichi Bannai; Hirotake Kurihara; Da Zhao; Yan Zhu 015 (J. Comb. Theory, Ser. A, 2025)

On the existence and non-existence of spherical m-stiff configurations. - Eiichi Bannai; Hirotake Kurihara; Hiroshi Nozaki (Discret. Math., 2026)