Asian culture isn't just about family taking care of one another - it's also about community helping one another out. Yes - there are Asian homeless people and if I'm not mistaken the food banks in SF saw a sharp rise in elderly Asians standing in line for extra food this year. A bit of an article....
The official average age of homeless people is about age 50 there and these people have little likelihood of regaining any permanent employment - there are not the jobs and training for new jobs is inadequate, which leaves these people homeless or showing up for 'day labor' situations. These people are shamed, for they have the work ethic, want to work and now are in a homeless situation, so they stay somewhat out of sight and try not to be highly visible. Yet, as here, in my opinion, the reasons for homelessness are often structural and not the particular individual's 'fault', but rather are the "system's." And, given the changes in the family, I would expect in the future that more youth there will fall into homeless situations.
In spite of the growing homeless numbers and situation in Japan, it is very obvious that homelessness is far more severe and cruel in the United States, with an estimate of around 1,000,000 homeless (the lowest figure I've ever read is some 300,000) and possibly several million more 'on the fringe' in a country of around 300 million people, compared to Japan's 125 million people and the governmental claims of only some 20,000 homeless.
Even Mother Teresa noted, when she visited New York City, that she had never seen greater suffering than there, which is amazing considering the conditions in Calcutta and Bombay. We have a sort of go-it-alone culture and homelessness involves shame in a country that has a strong work ethic and an emphasis on materialism in all aspects of living, so homeless conditions (given our lack of a sense of 'community') results in far more misery and challenges here than in other countries where there might even be worse conditions, but where there is greater support from one homeless person to another or acceptance and support from the greater community