The results of joint research with Dr. Noriyuki Azuma, Dr. Hiroshi Nishina, and colleagues at Tokyo Medical and Dental University and the National Center for Child Health and Development have been published in Genes to Cells, an international journal of molecular biology. This research focused on INTS15, a protein of unknown function that was speculated to be the 15th subunit of Integrator, a giant protein complex that binds to the C-terminal domain of RNA polymerase II. The study revealed the novel function of INTS15 in cell cycle regulation and differentiation.