Ken Takeshi Kusakabe

The paper examines the evolution of the growth hormone gene in African Pygmy Mouse, finding it diverged earlier and may have evolved independently with different functions.

The study examines genetic characteristics of Apodemus speciosus in Yamaguchi Prefecture, finding they belong to the Honshu-Shikoku-Kyushu group with a western Japan-type chromosome set, but some form a unique genetic cluster.

The paper performs histological analysis of implanted embryos in large Japanese field mice and compares their developmental stages to mice.

This study shows that hyperpolyploid mouse embryos can develop into blastocysts, and aggregation recovers pluripotent cells in hexadecaploid embryos.