one point to look at it is: that is how culture aids personal restraint from deviation. will power is an individual's self-responsibility and thus they tend to feel shame if ever they fail to exercise that kind of power (which is a sort of responsibility not merely for themselves, but for the whole collective (i.e. society, family) as well).
Iwase Nobutada Institute of Social Sciences, University of Tsukuba, Ibaraki 305-8571, Japan
Stigma of mental illness in Japan, 2002
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