Kamato Hongo, the oldest living person in Japan, turned 114 at his home in Kagoshima on Sunday.
According to his daughter, Shizue Kurauchi, 77, Hongo has undergone a recent change in lifestyle in which he now sleeps for two days and then stays awake for two days.
"He may be asleep until late afternoon today," she told reporters. He still has a good appetite and loves to sip green tea while licking clusters of muscovado, a dark raw sugar, she said.
Hongo was born in the town of Isen in Kagoshima in 1887. The town is known for being the lifelong home of the late Shigechiyo Izumi, who died in 1986 after living 120 years and 237 days -- Japan's current longevity record.