The artist’s body was discovered floating off the coast of Nago in Japan’s Okinawa Prefecture.

He seems to have been traveling alone and was snorkeling when he died, according to the Coast Guard.

Takahashi, also known as Kazuo Takahashi, began working as a manga artist in 1982.

YU-GI-OH!: THE DARK SIDE OF DIMENSIONS

‘Yu-Gi-Oh’ creator Takahashi Kazuki has died at the age of 60 from unknown causes.Everett Collection

Master Duel, had been downloaded more than 30 million times since April.

Takahashi continued to supervise the development of the manga, which frequently appeared on various best-seller lists.