In 1992, after graduating from Ritsumeikan University, he joined Matsushita Electric Industrial Co., Ltd. (now Panasonic) as an employee.

As a lifelong pursuit, he conducted excavations of prehistoric creatures, discovering numerous large vertebrate fossils in various parts of Japan.

These discoveries include Satsuma-utsunomiya-ryu, named after him, as well as dinosaurs (carnivorous, herbivorous, and piscivorous), mosasaur, pterosaur, and other major Mesozoic vertebrate fossils in Japan.

In collaboration with Yasuhisa Nakajima of Tokyo City University, they announced the world's first plaeiosaur "pellet" fossil.

[10][11] With Nakajima, he has also collaborated on other research, including the discovery of Spinosauridae fossils in Wakayama Prefecture,[12] pterosaur fossils discovered in Kagoshima (commonly referred to as Satsuma-yokuryu),[13] and the excavation and research of a dinosaur bone bed[14] in Kagoshima Prefecture, among others.