Adventure World (Shirahama-cho, Wakayama Prefecture) celebrated its baby king penguin season in February 2025 with the birth of four babies.
Three of the babies are currently being artificially raised at the non-public facility "Penguin Base. (One died on the second day after birth).
Adventure World is home to approximately 100 king penguins, the most of any breeding facility in Japan.
To maintain genetic diversity, we are actively engaged in both natural and artificial breeding.
　King penguins are the second largest of all 18 penguin species (85-95 cm in length), and when they grow up, the yellow patterns on their chest and head are very colorful, making them the most beautiful penguins in the world.
We will keep you posted on SNS and other social networking sites, so please keep a close eye on the baby penguin's growth and development.　


■Date of birth: February 9, 12, 22, and 23, 2025
■Number of hatchlings: 4 in total (one of them died on the second day after birth)
■Body weight: The baby weighs about 200g.
Sex: Unconfirmed
■Parent Information: Lives at Penguin Base in Adventure World


We are working on artificial rearing until the baby's weight grows to about 300g, which is stable.
　Baby penguins eat fish and other food that is digested in their stomachs and spit out by the parent birds. During artificial rearing, we feed herring, krill, cream, and water in a liquid concentrate in a syringe through a rubber tube.
　The baby king penguins are currently only available to participants of the Marine World Wish!
　　We will post the baby king penguins on SNS and other social networking sites as needed.

About Adventure World Penguin Project】
Adventure World started breeding Humboldt penguins and northern penguins when it opened in 1978, and in 1990, it began a full-scale breeding and breeding research project called the "Penguin Project" to reproduce a penguin colony (breeding group) that lives in the natural world. Since 1990, we have been focusing on breeding and reproduction research as the "Penguin Project" to reproduce a penguin colony (breeding group) living in the wild.
We have bred Adelie penguins, bearded penguins, gentoo penguins, and king penguins, and in 1997, we started breeding research on Emperor penguins, the world's largest penguin.

Adventure World Penguin Breeding Results
1978 : First breeding of Humboldt penguins
1990 : Eggs of Adelie penguins, bearded penguins, and gentoo penguins are brought in for artificial incubation and brood rearing
1992 : King penguin eggs are brought in for artificial incubation and brood rearing. Artificial incubation and brood rearing
1994 : First gentoo penguin brood
1995 : First king penguin brood
1996 : First Adelie penguin brood
1997 : First emperor penguin brood
1998 : First Cape penguin brood
1999 : First bearded penguin brood
2004 : 2004 : The first successful breeding of Emperor penguins in Japan, the second in the world
2005 : The first breeding of Emperor penguins in Japan was awarded the "Breeding Award" by the Japan Association of Zoos and Aquariums
2006 : The first breeding of the northern penguin. This marked the first breeding of eight species of penguins in Japan.
2020 : Succeeded in the artificial insemination of a king penguin for the second time in Japan

About King Penguins]
■ Classification: Penguin Family
■ Scientific Name: Aptenodytes patagonicus
■ English Name: King Penguin
■ Habitat: Subantarctic region including Falkland Islands and South Georgia Island
■ Food: In Adventure World, mainly hockey and shishamo ducks
■ Breeding: One egg is laid per breeding pair. Reproduction: One egg is laid per brood, and the male and female take turns carrying the eggs on their legs and covering them with their abdominal skin (egg sac) for 52-56 days.
Life span: 20-30 years
■Length: 85-95 cm
■Weight: about 15 kg
■Features: The bright colors of the head and breast. The name "king penguin" comes from the fact that it was considered the largest penguin until the discovery of the emperor penguin.