■ My research area is number theory. I have been working on various topics such as pro-l fundamental groups, Ihara power series for Jacobi sums, j-invariants of supersingular elliptic curves, the Chowla-Selberg formula, zeros of modular functions/forms, Bernoulli and poly-Bernoulli numbers, multiple zeta values, quasimodular forms, the elliptic modular function, etc.