Ueno Zoo announced the birth of its first giant panda in five years on Monday.

Shin Shin, 11, gave birth to a cub at 11:52 a.m., and the mother was confirmed to be holding the cub later in the day, said Mikako Kaneko, a section chief at Ueno Zoological Gardens in Tokyo.

Because Shin Shin has been holding onto the baby, the zoo hasn't been able to confirm its sex or weight, but it probably weighs around 150 grams, Kaneko said.