The simple answer: Lei Lei the giant panda was born on June 23, 2021. As of May 2026, she is 4 years old. She will turn 5 on June 23, 2026.
But the story behind that simple age is one of the most emotionally charged, politically loaded, and culturally significant panda stories in recent Japanese history. Lei Lei was not just a zoo animal. She was a symbol. When she left Japan on January 27, 2026, she took with her something Japan had not been without since 1972 — a living giant panda on Japanese soil.
This article covers everything about Lei Lei: her age, her birth, her life at Ueno Zoo, her parents, her twin brother, her departure, and the remarkable human story of what giant pandas mean to Japan.
Bio at a Glance
| Detail | Info |
|---|---|
| Name | Lei Lei (蕾蕾) |
| Name meaning | Blooming bud |
| Species | Giant panda (Ailuropoda melanoleuca) |
| Gender | Female |
| Date of birth | June 23, 2021 |
| Age in May 2026 | 4 years old |
| Birthplace | Ueno Zoological Gardens (Ueno Zoo), Tokyo, Japan |
| Mother | Shin Shin (also known as Bi Li) |
| Father | Ri Ri (also known as Xian Nv) |
| Twin brother | Xiao Xiao (晓晓) — meaning “dawn’s light” |
| Older sister | Xiang Xiang — returned to China February 2023 |
| Owner | China Wildlife Conservation Association (all pandas are Chinese property) |
| Residence | Ueno Zoo, Tokyo (June 2021 – January 27, 2026) |
| Current location | Breeding facility in China (as of January 27, 2026) |
| Distinguishing feature | No green line on her back (Xiao Xiao has a green identification mark; Lei Lei does not) |
| Significance | Last panda to leave Japan — Japan is now panda-free for first time since 1972 |
Lei Lei’s Age: The Simple Answer With a Complicated Context
Lei Lei was born on June 23, 2021. She is 4 years old in May 2026 and will turn 5 on June 23, 2026.
This makes her, as of 2026, a young adult panda approaching sexual maturity — which is precisely why China recalled her and her twin brother Xiao Xiao. The official statement from Ueno Zoo confirmed: “This move was planned in accordance with an agreement, but it is an important departure for the two cubs as they reach sexual maturity.”
In the wild, giant pandas typically reach reproductive maturity between 4 and 8 years of age. China’s conservation program requires pandas who reach sexual maturity to be moved to breeding facilities where they can contribute to the species’ propagation under scientific supervision. Lei Lei, at 4, was approaching that threshold.
Her departure was not a surprise. It was written into the agreement between Ueno Zoo and China Wildlife Conservation Association from the moment she was born.
Born in Tokyo, Loved by a Nation
June 23, 2021, was a significant date not just for Ueno Zoo but for Japan as a whole.
Giant panda births are rare events under any circumstances. Pandas have an extremely limited breeding window — females are fertile for only one to three days per year. Successful births in captivity have historically been uncommon, though conservation science has improved dramatically over the past three decades. The birth of twins is even rarer and more celebrated.
Lei Lei and Xiao Xiao were born to Shin Shin (also referred to as Bi Li in Chinese records) and Ri Ri (Xian Nv) — a pair on loan from China who had been living at Ueno Zoo. Shin Shin had previously given birth to Xiang Xiang, a female cub born in 2017, who lived at Ueno Zoo until returning to China in February 2023. That made Xiang Xiang the twins’ older sister — and the animal whose own departure had prepared Japanese panda fans for what would eventually happen with Lei Lei and Xiao Xiao.
The twins were the first giant pandas born at Ueno Zoo in 14 years when they arrived in 2021. They triggered a national “panda boom” that Japanese media covered extensively. Merchandise appeared immediately. Viewing queues stretched for hours. The names — Xiao Xiao meaning dawn’s light and Lei Lei meaning blooming bud — were chosen by Ueno Zoo and announced publicly, generating news coverage across every major Japanese media outlet.
How to Tell Lei Lei From Xiao Xiao
Zookeepers at Ueno Zoo used a practical identification system. Xiao Xiao, the male twin, has a green marking on his back. Lei Lei, the female, does not. Visitors who could not distinguish the twins on sight by behavior or body shape used the green mark to identify Xiao Xiao — which meant Lei Lei was whoever did not have it.
Their parents Shin Shin and Ri Ri returned to China in September 2024 — before the twins’ own departure. This left Lei Lei and Xiao Xiao as the only remaining giant pandas at Ueno Zoo and the last giant pandas in Japan. Their sister Xiang Xiang had already left in February 2023.
Five Decades of Pandas in Japan — What Lei Lei’s Departure Ended
1972: The Beginning
Japan’s relationship with giant pandas began on October 28, 1972, when two pandas — Kang Kang and Lan Lan — arrived at Ueno Zoo from China as a diplomatic gift to celebrate the normalization of Sino-Japanese relations. It was Chairman Mao Zedong’s era of panda diplomacy. The animals were a tangible expression of political goodwill.
The reaction in Japan was extraordinary. Enormous crowds queued for hours. Ueno Zoo became the most visited zoo in Japan overnight. A cultural phenomenon was born.
Since 1972, more than 30 giant pandas have lived at Japanese zoos. Several have been born on Japanese soil. Each new arrival or birth has triggered what the Japanese press consistently calls a “panda boom” — an explosion of media coverage, merchandise, increased zoo attendance, and genuine public emotion.
Japan developed an attachment to giant pandas that goes beyond most other countries’ relationships with the animals. The pandas became part of Japanese cultural identity — inseparable from Ueno’s identity as a neighborhood, from zoo-going as a family activity, from childhood memories for several generations of Japanese people.
2026: The End of That Chapter
On Sunday, January 25, 2026, Ueno Zoo held its final public viewing day for Xiao Xiao and Lei Lei. The zoo capped attendance at 4,400 people. Reservation requests exceeded 100,000 — approximately 24.6 times the daily limit. It was the most in-demand day in the zoo’s reservation system’s history.
Visitors wore black-and-white panda-themed clothing. They carried stuffed panda toys. They raised cameras above the crowd. One panda fan named Michiko Seki, dressed in a panda-patterned shirt, had been photographing pandas for years and said she was relieved the twins looked healthy and lively in their final days. A web engineer named Takahiro Takauji had visited Ueno Zoo almost every day for over a decade, amassing more than 10 million photographs of the pandas and publishing several panda photo books. On the final public day he competed for a viewing reservation alongside thousands of others. His one-minute slot in the viewing area produced thousands of camera shots.
One-minute viewing slots. For the chance to see a panda for sixty seconds.
That is what Lei Lei and her brother meant to Japan.
On Tuesday, January 27, 2026, Xiao Xiao and Lei Lei departed Ueno Zoo. They were driven to Narita Airport and boarded a flight to China. The official Ueno Zoo statement read: “We are filled with a mixture of emotions, including gratitude for the love and comfort they received from so many people, anticipation for the important role they will play in breeding, and sadness at their departure.”
Japan was left without a single giant panda for the first time since 1972.
The Political Dimension Nobody in the Panda Queue Could Ignore
Giant pandas are not just conservation animals. They are diplomatic instruments.
China retains ownership of every giant panda in the world, including all cubs born overseas. Host countries pay substantial annual fees — often described as conservation support — for the privilege of housing them. The terms of any panda loan reflect the state of bilateral relations between China and the host country.
The timing of Lei Lei and Xiao Xiao’s return coincided with a deterioration in Sino-Japanese relations.
In late 2025, Japanese Prime Minister Sanae Takaichi signaled that Tokyo might join a defensive response if China moved militarily against Taiwan. Beijing responded with diplomatic displeasure. The political frost that followed sat uncomfortably alongside the farewell to two four-year-old pandas.
Japanese requests for replacement pandas after the twins’ departure have reportedly been met with uncertainty from Beijing. Whether Japan will receive new panda loans depends on whether diplomatic relations improve. As of early 2026, no new panda loan agreement between China and Japan has been announced.
Asao Ezure, who manages a souvenir shop near Ueno Zoo, kept his signs featuring Xiao Xiao and Lei Lei displayed after their departure. “Pandas are the star of Ueno,” he said. “I believe they will come back someday.”
Whether that belief is founded depends on negotiations that have nothing to do with bamboo.
Lei Lei’s Life at Ueno Zoo: What We Know About Her Years in Japan
The First Months
Giant panda cubs are born in a remarkably undeveloped state. At birth they are approximately the size of a stick of butter — hairless, pink, and completely dependent on their mother. Their eyes do not open until 50 to 60 days after birth. They begin crawling at around 10 weeks. Their teeth appear by 14 weeks.
Lei Lei and Xiao Xiao spent their first months in the behind-the-scenes nursery facility at Ueno Zoo with Shin Shin. Zookeepers practiced twin-swapping — a conservation technique developed through panda research at San Diego Zoo and widely adopted internationally — where twin cubs are alternated between the mother and supplemental care to ensure both receive adequate nutrition and maternal bonding, since panda mothers typically only raise one cub at a time.
The twins were introduced to the public viewing area as they grew and became more mobile. Their first public appearances generated enormous media coverage. Watching two small pandas tumble, climb, and eat bamboo became one of Ueno Zoo’s defining visitor experiences through 2022, 2023, 2024, and 2025.
The Transition to China
Their parents Shin Shin and Ri Ri left for China in September 2024. This was documented but did not generate the same scale of public farewell as the twins’ own departure — perhaps because the parent pandas were older and less visually compelling, or perhaps because the public understood the twins were still remaining and the real goodbye was still to come.
After their parents left, Lei Lei and Xiao Xiao navigated their final months at Ueno Zoo without their mother and father. The period from late 2024 through January 2026 was, in effect, their final chapter in Japan.
Lei Lei in China: What Happens Now
Lei Lei and Xiao Xiao were transported to a breeding facility in Sichuan province, China — the heartland of giant panda conservation and home to the Chengdu Research Base of Giant Panda Breeding and related facilities.
The explicit reason stated by both Ueno Zoo and Chinese conservation authorities: the twins are approaching sexual maturity and need to be in a breeding facility where they can potentially contribute to the species’ population.
Lei Lei, at 4 going on 5, is entering the age range when female giant pandas in managed care can begin successful breeding — typically between 4 and 8 years old. China’s conservation program will evaluate her reproductive capacity, match her with suitable males, and attempt to produce offspring.
All cubs born from any breeding involving Lei Lei will remain property of China under the existing panda conservation and loan framework. If she produces cubs, those cubs will eventually either be placed at another zoo under loan or remain at the facility in China.
Her life in Japan — the bamboo meals watched by thousands of visitors, the merchandise bearing her name and image, the farewell crowds who reserved viewing slots months in advance — has been replaced by the interior work of conservation. She is no longer a cultural symbol. She is a breeding animal in a scientific program.
Whether she successfully breeds and contributes to the species’ future is a question that cannot currently be answered.
Giant Pandas in 2026: The Conservation Context Lei Lei Belongs To
Giant pandas were classified as endangered for decades. In 2016, the International Union for Conservation of Nature downgraded their status from Endangered to Vulnerable — a significant conservation achievement reflecting increased wild populations through China’s habitat protection program and improved captive breeding success rates.
The wild population of giant pandas is estimated at approximately 1,590 to 2,000 individuals. China has established 67 giant panda reserves protecting habitat in Sichuan, Gansu, and Shaanxi provinces.
The collaboration between Chinese authorities and international zoos — including San Diego Zoo Wildlife Alliance’s 30-year partnership with China Wildlife Conservation Association — has produced advances in panda milk formula, neonatal care, reproductive science, and habitat management that have dramatically improved cub survival rates. San Diego Zoo’s research helped raise nursery-reared cub survival rates from less than 10% to over 90%.
Lei Lei and Xiao Xiao were born into this scientific framework and are now returning to its center. Their biological contribution to the species is, in the language of conservation, the primary purpose of their existence.
That fact coexists with the reality that to millions of Japanese people, they were something else entirely.
What the Internet Gets Wrong About Lei Lei
Several errors and confusions appear in coverage of Lei Lei and her age.
“Lei Lei was born in 2020” — false. Her confirmed birth date is June 23, 2021. Multiple primary sources confirm this including Ueno Zoo’s own official statements and CGTN coverage.
“Lei Lei is at San Diego Zoo” — this appears in some general panda searches that conflate different animals. Lei Lei of Ueno Zoo has no connection to San Diego Zoo. The San Diego Zoo’s current pandas are Yun Chuan (male) and Xin Bao (female), who arrived in June 2024. Lei Lei of Ueno Zoo is a different animal entirely.
“LeLe the panda” — this name is sometimes associated with the Memphis Zoo’s male panda LeLe, who died in January 2023 at approximately 24 years old. That animal was a completely different panda — adult male, Memphis Zoo, different animal and different story from Lei Lei at Ueno Zoo.
“Lei Lei and Xiao Xiao died in China” — as of current reporting, no such report exists. They departed for a breeding facility in Sichuan in January 2026. They are alive.
“Japan still has pandas” — as of January 27, 2026, Japan has no giant pandas. This is the first panda-free period in Japan since 1972. It is documented and confirmed.
Where She Is in 2026
Lei Lei is 4 years old, living at a breeding facility in Sichuan province, China. She arrived in late January 2026. She is under the care of Chinese conservation specialists. She is approaching the lower end of the reproductive age range for giant pandas in managed care.
She is not visible to the general public. She is not on display at a zoo open to visitors. She is in the less visible, less photographed, more scientifically significant chapter of a panda’s life — the chapter that determines whether she will contribute to the survival of a species.
Japan is panda-free for the first time in over fifty years. The souvenir shop owner near Ueno believes the pandas will come back someday. The diplomatic reality makes that belief uncertain.
Lei Lei is 4 years old. She will turn 5 on June 23, 2026. She ate bamboo in Tokyo in front of millions of people and then she left.
That is her story so far.
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FAQ: 12 Real Questions About Lei Lei’s Age and Life
1. How old is Lei Lei the panda?
Lei Lei was born on June 23, 2021. She is 4 years old as of May 2026 and will turn 5 on June 23, 2026. Her name means “blooming bud” in Chinese (蕾蕾).
2. Where was Lei Lei born?
At Ueno Zoological Gardens — Ueno Zoo — in Tokyo, Japan. She was born there on June 23, 2021, along with her twin brother Xiao Xiao (meaning “dawn’s light”). They were the first giant pandas born at Ueno Zoo in 14 years.
3. Who are Lei Lei’s parents?
Her mother is Shin Shin (also known by her Chinese name Bi Li) and her father is Ri Ri (also known as Xian Nv). Her parents returned to China in September 2024, leaving Lei Lei and Xiao Xiao as the only pandas remaining at Ueno Zoo.
4. Does Lei Lei have any siblings?
Yes. Her twin brother is Xiao Xiao, born the same day — June 23, 2021. Her older sister is Xiang Xiang, born at Ueno Zoo in 2017, who returned to China in February 2023. The twins are Shin Shin’s third and fourth cubs born at Ueno Zoo.
5. How can you tell Lei Lei and Xiao Xiao apart?
Xiao Xiao, the male, has a green identification marking on his back. Lei Lei, the female, does not have this mark. This was the practical method used by zookeepers and visitors to distinguish between the two identical-looking twins.
6. Where is Lei Lei now?
At a giant panda breeding facility in Sichuan province, China. She and Xiao Xiao departed Ueno Zoo on January 27, 2026, as part of the planned agreement between Ueno Zoo and China Wildlife Conservation Association, timed to coincide with the twins approaching sexual maturity.
7. Why did Lei Lei leave Japan?
Two reasons, both confirmed by official sources. First, under Chinese policy, all giant pandas and their offspring remain property of China, and loans are governed by formal agreements with defined return timelines. Second, Lei Lei and Xiao Xiao were approaching sexual maturity — giant pandas typically reach reproductive age between 4 and 8 years — making their transfer to a breeding facility the next stage of their conservation role.
8. What happened when Lei Lei left Japan?
The farewell generated enormous public emotion. On the final public viewing day, January 25, 2026, the zoo capped attendance at 4,400 people while reservation requests exceeded 100,000. Visitors wore panda-themed clothing, carried stuffed panda toys, and were limited to one-minute viewing slots. The departure on January 27 left Japan without a single giant panda for the first time since 1972 — when China first loaned pandas as part of diplomatic normalization.
9. Is Lei Lei the same panda as the Memphis Zoo’s LeLe?
No. The Memphis Zoo’s LeLe was a male giant panda who died in January 2023 at approximately 24 years old. He was a completely different animal. Lei Lei of Ueno Zoo is a 4-year-old female born in Tokyo in 2021. The similarity in name spelling has caused occasional confusion in search results.
10. Is Lei Lei at San Diego Zoo?
No. The San Diego Zoo’s current giant pandas are Yun Chuan (a male born approximately 2019) and Xin Bao (a female born approximately 2020), who arrived from China in June 2024. Lei Lei of Ueno Zoo has no connection to San Diego Zoo.
11. Will Japan get more pandas after Lei Lei left?
There is no confirmed plan as of early 2026. Japanese requests for replacement panda loans have reportedly encountered diplomatic uncertainty in the context of strained Sino-Japanese relations following Japan’s statements about a potential response to Chinese military action against Taiwan. Whether new pandas will arrive depends on bilateral diplomatic developments.
12. What does Lei Lei’s name mean?
Lei Lei (蕾蕾) means “blooming bud” in Chinese. Her twin brother Xiao Xiao (晓晓) means “dawn’s light.” The names were chosen by Ueno Zoo to symbolize hope for a brighter future and the ongoing Sino-Japanese conservation friendship — an optimistic framing that the political events of 2025 and 2026 made somewhat ironic in retrospect.