Where does “袋鼠” come from?

袋鼠 (Chinese) comes from Japanese 鼠, from Japanese nezumi.

袋鼠 (Chinese): kangaroo

Definitions

Step	Language	Word	Meaning
1	Japanese	鼠	a mouse or a rat; general term for members of...
2	Japanese	nezumi	—

袋鼠 — Etymology, Origin & Word History | Etymology Explorer