求翻译：1956年10月苏日建交时发表的联合宣言中，苏联曾经同意在苏俄缔结和平条约以后把北方四岛中的齿舞和色丹两个岛交还日本，但是日本没有同意，而要求归还全部四个岛屿。是什么意思？

In the joint declaration of the establishment of diplomatic relations between the Soviet Union and Japan, published in October 1956, the Soviet Union had agreed to in the Soviet Union after the conclusion of a peace treaty, the four northern islands of Habomai and Shikotan Island returned to Japan,

Su October 1956 when it established diplomatic relations in the Joint Declaration, the Soviet Union had agreed to the Soviet Union after the conclusion of a peace treaty in the North Island 4 the tooth dance and color two of bin Laden, one of the islands returned to Japan, but Japan did not agree an

In October, 1956 when Soviet date establishing diplomatic relations publishes in the joint declaration, Soviet Union once agreed will conclude the peace treaty in Soviet Russia later returns North Four Islands' in tooth dance and the color Dan two islands Japan, but Japan will not have the agreement

Joint Declaration issued at the October 1956 sougy ties, after Russia concluded a peace treaty, the Soviet Union had agreed to four islands in the North of both the habomai and Shikotan Islands returned to Japan, but Japan did not agree to, and seek the return of all four islands.

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