2) It is the international problem which affect on all over the world politically, economically. Also, it has been occurred for a long time since the end of WWⅡ.
3) I learned more about Northern Territories because I'm from Hokkaido. Moreover I have been to Russia twice and I wondered "How should Japan and Russia get agreement each other?"
4) I want to know 1) the reason which is the problem occurred 2) the perspective of Japan and Russia 3) any idea to solve 4) economically: fishing 5) economically: resources 6) politically
5)
Hasegawa, T.,(1941-). The northern territories dispute and russo-japanese relations. Berkeley, CA: University of California, International and Area Studies.
'People's daily' on northern territories day.(1981, February 13). BBC Summary of World Broadcasts,
Sadahiro, T., Correspondent, Y. S., & Yomiuri. (2011, February 11). Russia toughens stance on north isles. The Daily Yomiuri(Tokyo), pp. 1.