I am not a scholar and didn’t receive history education as I spent my teen years in USA. But I have some beliefs about your questions.
Could you help me understand how the Japanese culture has become so?
I read a hypothesis about Japanese culture written by a Japanese scholar when I was a student. According to the hypothesis and my understanding of it, Japanese reserved tendency is result of hundreds of years of samurai rule. In those days, samurais were the authority and justice. There was no human right, the court system, and bringing of witness to serve justice. Samurais could kill anyone, and if the victim was a peasant there was probably not much repercussion for samurais. So people tried not to provoke samurais. I think this was the main part of the hypothesis. I like this hypothesis. When there was no court, human rights, justice, and people being a homogeneous race, I think the best way for people to live in peace with each other was to have this reserved manner toward each other.
And, could you comment more about the high suicide rate and the many causes for it?
I think the major direct reason is economic well-being. But other significant reasons may be lack of social (emotional) support for those who fall out of the main stream life of the society. Regular status job, house, family (spouse & children), good health are what I think constitute the main stream life of the society. When one loses them and gets pushed out to the life of periphery, the life can suddenly be unbearable because the social (emotional) support is not available enough. The other reason may be the useless Buddhist denominations that I believe are sending vain messages to people that most can be saved and go to their heaven after a couple of hours of a funeral service. Thus, people don’t believe they can go to hell by killing themselves, and instead can see dying as relief. The other reason may be lack of cheap pastime like visiting beautiful nature. If you visit Tokyo, you’ll notice people are crammed together in a tiny area. You need to travel long and pay lots of money to see the healing nature. I think USA has lots of such resources and healing people every day.
How the message/peace/love of Christ and the teachings of the Church resonate there?
People in general respect Christianity. But it is sort of weird. They seem to respect priests and nuns a lot. But when it comes to laity people, people do not seem to view them as special. I think the loving and Salvation messages that Evangelists are sending on the streets are basically ignored or not taken seriously as religious messages that are practically useless. Every year, I see the Evangelists taking to streets and playing these messages aloud from their recorders in New Year holiday season.
People just pass by as if it is another occasion of the religious advertisement and nothing special is played.