This man is in his 80s and he is in prison -- a cage of structure and certainty that he is hesitant to ever leave.
"I don't know what kind of life I should lead after I get out. I'll be worried about my health and financial situation once I leave," the inmate told AFP on condition of anonymity from Tokyo's Fuchu Prison, where he is serving time for attempted theft.
The situation has become so dire the government approved a plan to deploy nursing care staff to about half of Japan's 70 prisons from April, allocating a budget of 58 million yen (USD 495,000).
In 2015, almost 20 percent of those who were either arrested or interrogated by police were aged 65 or older -- up from 5.8 percent in 2000, according to the National Police Agency.
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Most are imprisoned for petty crime such as shoplifting and theft.
"It's a problem that the work of prison officers is becoming more like nursing care," Justice Ministry official Shinsuke Nishioka said, contrasting that with the traditional task of ensuring the incarcerated don't escape.
Officers at Fuchu, Japan's biggest male-only correctional house, have to change diapers for some prisoners and help them bathe.
"Older prisoners sometimes are hard of hearing," Nishioka said. "They don't understand instructions and they have to go to the toilet often. It's tough. We'll need more officers."
Prison life in Japan is far from easy -- talking is forbidden while at work, inmates must walk single file, and bathing is restricted.
Even during rare events put on for their entertainment, they are only allowed to sit ramrod straight with their hands on their laps. Applause is generally forbidden.
Life is monotonous, and naturally restricted, yet many prefer this predictable regimen where they have shelter, food, and medical care, to life on the outside.