http://edition.cnn.com/2016/09/11/asia/japanese-millennials-hikikomori-social-recluse/index.html
The longer we stay in houses, the weaker our spirit becomes.
So, refusing to go out from home means to discourage themselves from interacting with people.
What we do in order to stay mentally healthy is to go out and exercise.
When it comes to me, I don't like exercise, but like going out(travelling).
Can I stay mentally healthy?
