National Museum of Nature and Science
The younger brother, Jiro, died at the age of four during the fifth expedition in July 1960. His body was made into a specimen and is placed together in the National Museum of Nature and Science at Ueno, Tokyo. The older brother, Taro, returned to Hokkaido University for his retirement, and died at the age of 15 in 1970. His body was also made into a specimen at Hokkaido University.