Updated December 11, 2023:
It's been a week since Mimpi gave birth, so here's an update on how she's doing now.

All three puppies, born on December 4, 2023, are healthy. They sometimes cry, but spend most of their time sleeping.

Mother Mimpi is breastfeeding her babies well, and she can also be seen relaxing a short distance away when the babies are sleeping.


Three cubs (Photo taken on December 9, 2023)

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December 6, 2023:
We would like to inform you that Mimpi, Sumatran Tiger at Ueno Zoo, has given birth to three cubs, as follows:

The birth of Sumatran Tiger

Birthday: December 4, 2023 (Monday)
Number of animals: 3
gender unknown
Parents: Mother: Minpi, 9 years old
Born on August 4, 2014 at Yokohama Zoological Gardens Zoorasia.
November 24, 2020: Transferred from Yokohama Municipal Nogeyama Zoo to Ueno Zoo
April 28, 2023: Gave birth to two cubs (Asa (female, first calf), the other was stillborn).
　　　　　　
Father: Blanc, age 10
Born on May 21, 2013, at Yagiyama Zoological Park in Sendai City.
December 3, 2018: Transferred from Misaki Park (Osaka Prefecture) to Ueno Zoo


"Mimpi" and her three offspring (center of the photo)
(Date of photo: December 4, 2023)

background

Our zoo is working in cooperation with other zoos to promote the breeding of Sumatran Tiger. On December 3, 2018, we received a male named "Bran" from Misaki Park in Misaki-cho, Sennan-gun, Osaka Prefecture (which closed in March 2020), and on November 24, 2020, we received a female named "Mimpi" from Yokohama Municipal Nogeyama Zoo, through a breeding loan (*).

When we placed them together for breeding purposes in late August of this year, we observed multiple matings. We confirmed that the first cub was born just before 8:00 AM on December 4th, the second around 8:30 AM, and the third around 9:00 AM.
　
Incidentally, Mimpi also gave birth to two puppies in April of this year (one of which was stillborn).

※About breeding loans
This is an animal loan agreement for the purpose of breeding. By transferring animals between zoos, the purpose is to form new pairs and contribute to breeding.

Current situation

Nursing behavior was observed at approximately 10:50 AM on Monday, December 4th. Both mother and calves are currently doing well.

About the release

The opening date will be announced on Ueno Zoo official website as soon as it is decided.

　The tiger exhibit was temporarily closed due to Mimpi giving birth, but the exhibit of all tigers except Mimpi and her newborn cubs reopened on Tuesday, December 12, 2023.
　Currently, the exhibition of all Sumatran Tiger is suspended, but from December 8th (Friday) onwards, tigers other than Mimpi and her newborn cubs may be temporarily released into the outdoor enclosure.
　

Current status of animal care at our zoo (as of December 5, 2023)

8 individuals (1 male, 4 females, 3 of unknown gender) *This includes the offspring born this time.

Domestic breeding situation (as of December 31, 2022)

7 zoos/aquariums, 18 animals (8 males, 10 females)
Source: 2022 Sumatran Tiger Domestic Pedigree Registry [Japanese Association of Zoos and Aquariums]

◎Related News
・ Sumatran Tiger cub has been born—the first at Ueno Zoo in 26 years!! (May 18, 2023)
・ Current situation of Sumatran Tiger mother and cub: Switching to artificial rearing (June 5, 2023)
・ The growth of Sumatran Tiger cub "Asa" and preparations for public release. (September 3, 2023)
・ Sumatran Tiger "Mimpi" may be pregnant. (December 3, 2023)

(December 6, 2023)
(December 8, 2023: Added information regarding "Publication")
(December 11, 2023: Status update)
(December 14, 2023: Added information regarding "Publication")