Xiang Xiang, a giant panda cub at Tokyo's Ueno Zoo, turned one on Tuesday.
Media crews were invited to the zoo on the eve of her first birthday.
Xiang Xiang was seen playing with a hammock that staff made by hand for her as a birthday gift.
The panda cub showed her appreciation by energetically bounding around, climbing trees and bars.
Xiang Xiang is the first panda to be born and raised at the zoo in 5 years.
Zoo officials say Xiang Xiang is growing steadily. She is fed on her mother's breast milk, but has started eating apples.
Last Tuesday, the zoo introduced a first-come, first-served system for viewing Xiang Xiang, who now weighs over 28 kilograms.
The new system has led to the number of Xiang Xiang's daily visitors increasing from around 9,000 to 15,000.
Previously, visitors were required to obtain special numbered tickets to catch a glimpse of the panda cub.
To mark Xiang Xiang's first birthday, the zoo has released commemorative cards and a photo book of the popular panda.