Pusuke, listed by the Guinness Book of World Records as the world's oldest-living dog, died in Japan on Monday. He was 26 years old - or somewhere between 117 and 185 in "human years," according to various calculations. There is no official method for converting dog years to human years.

The dog's owner, Yumiko Shinohara, said the male cross-breed died at Sakura in the Tochigi prefecture, north of Tokyo, according to the Kyodo news agency.

Pusuke was reportedly eating well and staying active until Monday, when he lost his appetite and had difficulty breathing.  Pusuke died peacefully, minutes after his owner returned home from a walk.

"I think (Pusuke) waited for me to come home," she said, according to Kyodo.

Born in April of 1985, Pusuke was recognized last December as the world's oldest-living dog.

The oldest-known dog on record, according to Guinness, was an Australian cattle dog named Bluey, who lived to the ripe old age of 29 years and five months before it was put down in November 1939.