Momiji, Pygmy Hippopotamus at Ueno Zoo, has given birth.


"Maple" child
(Date of photo: December 25, 2025)

The birth of Pygmy Hippopotamus

birthday Thursday, December 25, 2025
Number of people 1 head
sex female
*Gender was confirmed on December 26th.
parents Mother: Momiji, 22 years old
Born on November 20, 2003, Ueno Zoo.
　　　　　　
Father: Motomoto, 12 years old
Born on July 9, 2013, at Buin Zoo (Chile).
On March 20, 2023, it was received by Ueno Zoo from NIFREL (Osaka Prefecture).


Maple tree and child (Photo taken: December 25, 2025)

background

Ueno Zoo is working to breed Pygmy Hippopotamus through cooperation with other zoos. On March 20, 2023, they received a male hippo named "Motomoto" from NIFREL in Suita City, Osaka Prefecture, through a breeding loan (a contract to lend animals for breeding purposes).

In early June 2025, the two animals were placed together for breeding purposes, and multiple matings were observed. Subsequent ultrasound examinations confirmed the presence of what appeared to be a fetus. Preparations for the birth were underway, and it was confirmed that the fetus was born safely at 0:38 on December 25th.

Current situation

Nursing behavior was observed around 2:00 AM on Thursday, December 25th. The mother is calm, and both mother and child are doing well.

About the release

We will inform you of the release date as soon as it is decided.

Animal care status at Ueno Zoo (as of December 27, 2025)

5 cubs (2 males, 3 females) *Including the offspring born this time

Domestic breeding situation (as of December 27, 2025)

6 zoos/aquariums, 16 animals (5 males, 11 females) *Includes the offspring born this time.

(December 26, 2025)
(December 27, 2025: Gender added)