The cats arrived at Haneda airport in March 1967. Yoshinori Imaizumi kept them shortly until Togawa, having been entrusted by the museum to observe them, took charge of them for about two years. The cats were then transferred to the museum for monitoring. The male died on April 25, 1973 and the female on December 13, 1975. The male's pelt was temporarily stuffed, the blood was sent off for chromosomal research, and the rest of the body was preserved in formaldehyde. The female was stuffed and put on display in the museum.