It all began with a book "Repeated offenders with disabilities" written by Joji Yamamoto in 2006 who was an ex-politician and ex-offender.
In Kurobane prison in Tochigi prefecture where Yamamoto served about a year and half, he used to take care of elderly and the handicapped prisoners with personal care such as toileting, bathing, etc. After released from the prison, he wrote books about these prisoners and the Criminal Justice System of Japan concerning this particular population.
Yamamoto's books have casted such provoking questions as why elderly and handicapped did not receive any support until now, why they must remain in prison, why they have been isolated, etc.
Here is a website Japan Probe showing a video of the Kurobane's older prisoners as of 2010.
The founder of Zenteikyo and the head of its board members, Yosiaki Tashima, was stroked by the Yamamoto's books to the degree that he organized study groups of lawyers, social workers, government officials, etc. to investigate the situation then to solve the problems.
The Minister of Justice has chaged as of Sep 2014 since this photo was taken.
After several years of study done by a team of researchers including Yamamoto and funded by the Japanese government, Tashima took the initiative to create the 48 Regional Sustained Community Life Support Centers for the Elderly and Handicapped Ex-offenders throughout entire Japan in 2009, inspiring the all involved in this matter.
Older people and people with disabilities in the Criminal Justice System of Japan have been a hidden and little-recognized population, but not any more.