3 links
Japan-Russia Relations (Territorial Issues)
mofa.go.jp
Article from the Japanese Ministry of Foreign Affairs on the state's claim of the Sakhalin and the Kurile Islands which it refers to as the Northern Territories.
Kurile Island conflict - Dispute Between Russia and Japan over Sovereignty of Islands
japan-101.com
Information and links on the conflict.
Secret of Sakhalin Island (Karafuto)
karafuto.com
Overview of history and discovery of Sakhalin Island (Karafuto), one of the territories still disputed between Japan and Russia from a Japanese perspective.