After 1975, the Soviet Union began openly to warn that a
Japanese peace treaty with China might jeopardize Soviet–Japan relations. In January 1976, Gromyko again visited Tokyo to resume talks on the peace treaty. When the Japanese again refused to budge on the territorial question, Gromyko, according to the Japanese, offered to return two of the Soviet-held island areas—the
Habomai Islands and
Shikotan—if Japan would sign a treaty of goodwill and cooperation. He also reportedly warned the Japanese, in a reference to China, against "forces which come out against the relaxation of tension and which try to complicate relations between states, including our countries." The signing of the
Sino-Japanese peace treaty in mid-1978 was a major setback to Japanese-Soviet relations. Despite Japanese protestations that the treaty's antihegemony clause was not directed against any specific country, Moscow saw it as placing Tokyo with Washington and Beijing firmly in the anti-Soviet camp. Officially, both sides continued to express the desire for better relations, but Soviet actions served only to alarm and alienate the Japanese side. The 1980s Soviet military buildup in the Pacific was a case in point. In 1979,
Kenji Miyamoto, as Chairman of the Japanese Communist Party, engaged in high-level dialogue with the Soviet leadership, including signing joint statements in Moscow with CPSU Secretary General Leonid Brezhnev, reflecting Cold War-era communist solidarity and Japan–Soviet party relations. The 1980s saw a decided hardening in Japanese attitudes toward the
Soviet Union. Japan was pressed by the
United States to do more to check the expansion of Soviet power in the developing world following the December 1979
Soviet invasion of Afghanistan. It responded by cutting off contacts beneficial to the Soviet regime and providing assistance to "front line" states, such as
Pakistan and
Thailand. Under Prime Minister
Yasuhiro Nakasone, Japan worked hard to demonstrate a close identity of views with the
Reagan administration on the "Soviet threat". Japan steadily built up its military forces, welcomed increases in United States forces in Japan and the western Pacific, and pledged close cooperation to deal with the danger posed by Soviet power. This economic cooperation was interrupted by Japan's decision in 1980 to participate in sanctions against the Soviet Union for its invasion of Afghanistan and by its actions to hold in abeyance a number of projects being negotiated, to ban the export of some high-technology items, and to suspend Siberian development loans. Subsequently, Japanese interest in economic cooperation with the Soviet Union waned as Tokyo found alternative suppliers and remained uncertain about the economic viability and political stability of the Soviet Union under Gorbachev. Japan-Soviet trade in 1988 was valued at nearly US$6 billion. Although public and media opinion remained skeptical of the danger to Japan posed by Soviet forces in Asia, there was strong opposition in Japan to Moscow's refusal to accede to Japan's claims to the Northern Territories, known to the Japanese as
Etorofu and
Kunashiri, at the southern end of the
Kuril Island chain, and the smaller island of Shikotan and the Habomai Islands, northeast of
Hokkaidō, which were seized by the Soviets in the last days of
World War II. The stationing of Soviet military forces on the islands gave tangible proof of the Soviet threat, and provocative maneuvers by Soviet air and naval forces in Japanese-claimed territory served to reinforce Japanese official policy of close identification with a firm United States-backed posture against Soviet power. In 1979, the Japanese government specifically protested a buildup in Soviet forces in Etorofu, Kunashiri, and Shikotan. The advent of the
Mikhail Gorbachev regime in Moscow in 1985 saw a replacement of hard-line Soviet government diplomats who were expert in Asian affairs with more flexible spokespersons calling for greater contact with Japan. Gorbachev took the lead in promising new initiatives in Asia, but the substance of Soviet policy changed more slowly. In particular, throughout the rest of the 1980s, Soviet officials still seemed uncompromising regarding the Northern Territories, Soviet forces in the western Pacific still seemed focused on and threatening to Japan, and Soviet economic troubles and lack of foreign exchange made prospects for Japan-Soviet Union economic relations appear poor. By 1990, Japan appeared to be the least enthusiastic of the major Western-aligned developed countries in encouraging greater contacts with and assistance to the Soviet Union. Changes in Soviet policy carried out under Gorbachev beginning in the mid-1980s, including attempts at domestic reform and the pursuit of détente with the United States and Western Europe, elicited generally positive Japanese interest, but the Japanese government held that the Soviet Union had not changed its policies on issues vital to Japan. The government stated that it would not conduct normal relations with the Soviet Union until Moscow returned the Northern Territories. The government and Japanese business leaders stated further that Japanese trade with and investment in the Soviet Union would not grow appreciably until the Northern Territories issue has been resolved. ==1990s: Dissolution of the USSR==