If we could trust others we wouldn't need lawyers all the time, we could do without them. In Korea the legal system isn't so complicated. In special circumstances, e.g. a court case, we employ lawyers, but ordinarily we don't need them. In America, on the other hand, virtually everything must be done through a lawyer, otherwise you can end up in trouble. That is not ideal though.
Japan also has traditions which can serve as an example to other people and nations.
The bushido code stresses one's duty to one's lord. In Japanese it's called giri. There are also many examples of people sacrificing everything to pursue and take vengeance on an enemy who had killed their master or parents. This is called katakiuchi and means vengeance. This tradition also stresses ninjo which means humane or humanitarian feelings, i.e. to help the weak and oppressed and to destroy evil.