[pm90]

I think Korea (I'm assuming RoK) has less to fear from Japan than from DPRK. The presence of US troops in both RoK and Japan pretty much prevents any kind of escalation of violence (if there is any to begin with). Besides, Japan's constitution explicitly forbids it from declaring war or maintaining a large offensive military[1].

After looking back to what happened from military expansion of Japanese imperialism back in WWII,

Except that Japan is now a democracy instead of a military-governed totalitarian state

[1] http://en.wikipedia.org/wiki/Article_9_of_the_Japanese_Const...

[bergie]

It seems the new nationalist government of Japan wants to change the constitution:

Mr Abe has made no secret of his wish to revise three of the country’s basic modern charters: the American-imposed constitution of 1946, committing Japan to pacifism; the education law, which Mr Abe thinks undervalues patriotism; and the security treaty with the United States, under which Japan plays a junior role. To describe the new government as “conservative” hardly captures its true character. This is a cabinet of radical nationalists.

http://www.economist.com/news/asia/21569046-shinzo-abes-appo...