A very interresting discussion started in another thread around that subject.
Many times in the past, cultures have disapeared from various reasons (Mayas for example)
Here we can discuss about Japan and the culture there, and how it's possible to protect it.
Some think that tourism may be a threat, as foreigners impose their cultural background when they stay too long in the country.
I do think that japanese people know very well for themselves how to protect their own culture. They probably do not need any advice at all and they should be the ones to decide for themselves.
Threats I see that are more threatning:
As you know, japan population is getting older and new generations aren't enough in number to ensure Japan's future.
It comes from one fact at least: The country is too cramped. So it imposes quite a high price for food, real estate and all of these kinds of basic need younger generations can attain easily.
So they have to work like crazy for their own living, and having a baby becomes a problem... 2 is almost unthinkable.
To me, the struggle of japan lies more in demography than anythin else.
What do you think?