They have no welfare system
Really? Japan. No welfare? And you've been there eh?
Welfare in Japan
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Social welfare, assistance for the ill or otherwise disabled and for the old, has long been provided in Japan by both the government and private companies. Beginning in the 1920s, the government enacted a series of welfare programs, based mainly on European models, to provide medical care and financial support. During the postwar period, a comprehensive system of social security was gradually established.
[1][2] Government expenditures for all forms of social welfare increased from 6% of the national income in the early 1970s, to 18% in 1989. The mixture of public and private funding have created complex pension and insurance systems. But a much older tradition calls for support within the family and the local community.
You have Google? Learn to use it. Makes you look less stupid.