August 12, 1978 - China Signs Peace and Friendship Treaty With Japan

On August 12, 1978, you can mark this as the day China and Japan formally buried decades of hostility by signing the Peace and Friendship Treaty in Beijing. Japanese FM Sunao Sonoda and Chinese FM Huang Hua put pen to paper, with Deng Xiaoping and Chairman Hua Guofeng looking on. The treaty covered sovereignty, anti-hegemony commitments, and peaceful dispute resolution. It took effect October 23, 1978 — and its full story runs much deeper than the ceremony itself.

Key Takeaways

• On August 12, 1978, Chinese FM Huang Hua and Japanese FM Sunao Sonoda signed the Peace and Friendship Treaty in Beijing.
• The treaty's five articles established mutual non-aggression, anti-hegemony commitments, economic cooperation, peaceful dispute resolution, and ratification procedures.
• A three-year negotiation deadlock over the anti-hegemony clause was resolved by referencing "any country" rather than naming the Soviet Union.
• The Soviet Union condemned the treaty via Tass, while the U.S. welcomed it and Taiwan declared it null and void.
• The treaty took effect October 23, 1978, following ratification instrument exchange during Deng Xiaoping's historic visit to Japan.

What Led China and Japan to Sign the 1978 Peace and Friendship Treaty?

The road to the 1978 China-Japan Peace and Friendship Treaty began six years earlier, when both nations established diplomatic relations through the 1972 Joint Statement. That diplomatic groundwork eliminated fundamental barriers and created a framework for bilateral agreements covering trade, aviation, navigation, and fisheries between 1974 and 1975.

Economic interdependence grew alongside these agreements, giving both nations strong incentives to formalize their peaceful relationship. Regional instability also pushed them closer together. Soviet expansion across Asia prompted China to propose anti-hegemony clauses, which Japan ultimately accepted through compromise language. Both nations recognized they shared strategic interests in maintaining regional peace and security. Japan had already demonstrated its capacity for rapid technological adoption, as seen when Nordic countries and Japan moved ahead of the United States in launching early commercial communications infrastructure during the same era.

Foreign Ministers Huang Hua and Sunao Sonoda led the signing ceremony in Beijing, with Chairman Hua Kuo-feng and Deputy Premier Deng Xiaoping witnessing the historic accord. The treaty formally took effect on October 23, 1978, following the exchange of instruments of ratification in Tokyo. The treaty was grounded on the Five Principles of Peaceful Co-Existence, establishing a philosophical foundation for resolving disputes through peaceful means without the use or threat of force.

Six Years of Talks: The Bumpy Road to the China-Japan Treaty

When Japan and China normalized relations in September 1972, few anticipated it would take another six years—and repeated breakdowns—before both nations could finalize a formal peace treaty.

Formal negotiations launched in 1974 but collapsed by 1975, when Japan rejected China's proposed "hegemony" clause—a thinly veiled Cold War jab at the Soviet Union. Talks stalled for years until restarting on July 21, 1978, between Ambassador Shoji Sato and Deputy Foreign Minister Han Nien-luang.

Even then, you'd see fresh tensions emerge through Fishing Disputes, as Chinese vessels clashed with Japanese patrol boats near the contested Senkaku/Diaoyu Islands in April 1978. Another deadlock followed in August before Foreign Minister Sonoda flew to Beijing on August 8, ultimately breaking the impasse and clearing the path to signing. In Japan, the treaty is commonly referenced by its abbreviated name, Nitchū Heiwa Yūkō Jōyaku, written in Japanese as 日中平和友好条約.

The treaty officially took effect on October 23, 1978, marking a significant milestone in the development of bilateral relations between the two nations, with peaceful coexistence and opposition to hegemony enshrined as its core principles.

How the Anti-Hegemony Clause Almost Killed the China-Japan Treaty

Few diplomatic disputes cut as close to the bone as the battle over the anti-hegemony clause—a single provision that nearly unraveled the entire China-Japan treaty before it could take shape.

China's historical rhetoric demanded explicit Soviet targeting, while Japan's negotiation tactics favored vague, generalized language. That gap froze talks for three years.

Here's what you need to know:

• China wanted the Soviet Union named directly as a regional hegemon
• Japan refused, fearing damage to Soviet relations
• Negotiations collapsed in 1975 and stalled until July 1978
• Foreign Minister Sonoda flew to Beijing on August 8 to break the deadlock
• The final compromise referenced "any country" seeking hegemony, satisfying both sides without naming Moscow
• Much like modern frameworks designed to protect national sovereignty, such as Canada's 2024 amendments strengthening oversight of inbound foreign investment, the anti-hegemony clause reflected each nation's core interest in guarding against external interference.

What Did the Treaty's Five Articles Actually Commit Both Countries To?

Signed on August 12, 1978, the China-Japan Peace and Friendship Treaty laid out five articles that locked both nations into specific, binding commitments—ranging from foundational peace principles to the mechanics of ratification.

Article 1 established sovereignty guarantees, mutual non-aggression, and peaceful co-existence.

Article 2 committed both sides to opposing hegemony in the Asia-Pacific and beyond.

Article 3 pushed for economic cooperation, cultural exchanges, and stronger people-to-people ties.

Article 4 required both countries to resolve all disputes peacefully, refusing any use or threat of force, in line with the UN Charter.

Article 5 handled ratification, confirming the treaty entered force on October 23, 1978, in Tokyo, with equal-authority texts in both Japanese and Chinese. Shortly after ratification, Chinese Vice Premier Deng Xiaoping made a landmark visit to Japan on October 22, 1978, marking a historic moment in the bilateral relationship.

Who Signed the 1978 Treaty and What the Beijing Ceremony Looked Like

On August 12, 1978, Japanese Foreign Minister Sunao Sonoda and Chinese Foreign Minister Huang Hua stepped forward as their nations' respective plenipotentiaries, affixing signatures and seals to duplicate originals of the treaty in both Japanese and Chinese. The ceremony atmosphere reflected the weight of six years of negotiation finally reaching resolution.

Key figures present included:

• Communist Party Chairman Hua Guofeng
• Deputy Premier Deng Xiaoping
• Japanese Ambassador Shoji Sato headed Japan's delegation
• Deputy Foreign Minister Han Nien-lung led China's side
• Both plenipotentiary signatures were preceded by full powers exchange and verification

Sonoda had arrived in Beijing on August 8 to break the negotiation deadlock, with final talks beginning July 21. Ratification instruments were later exchanged in Tokyo on October 23, 1978, bringing the treaty into force. Deng Xiaoping traveled to Japan for the ratification exchange, becoming the first Chinese leader to set foot in Japan and meet the Japanese emperor. The treaty represented a federal-style commitment between the two nations to prevent unintended conflicts from undermining the financial stability of citizens on both sides through cooperative economic policy.

How the 1978 Treaty Was Received by the Soviet Union, Taiwan, and the U.S

The treaty's signing on August 12, 1978 drew sharply divided reactions from the international community, reflecting the broader geopolitical tensions of the era. You'd see the Soviet backlash emerge immediately, with Moscow accusing China of hostility and protesting through Tass, charging that the anti-hegemony clause directly targeted Soviet influence in Asia.

The Soviets had issued repeated warnings to Japan before the signing, viewing it as an anti-Soviet alliance aligned with U.S. interests. This hostility was rooted in a long history of friction, as the 1969 Sino-Soviet border conflict had already pushed China firmly away from Moscow's orbit.

Taiwan's condemnation was equally swift. Foreign Minister Shen Chang-huan declared the treaty null and void, warning it threatened regional stability and damaged Taiwan-Japan relations.

Meanwhile, the U.S. openly lauded the agreement, viewing it as a positive development that reinforced American security interests following the 1972 normalization with China.

Why the 1978 Treaty Still Shapes How China and Japan Deal With Each Other

Decades after its signing, the 1978 treaty continues to anchor how China and Japan navigate their relationship, embedding core principles that neither side can easily dismiss.

You'll see its influence across multiple dimensions:

• Peaceful dispute resolution remains the default framework when tensions escalate
• Regional trade flows within a structure the treaty helped legitimize
• Cultural exchanges persist even during diplomatic friction
• Anti-hegemony commitments challenge both nations to resist aggressive posturing
• Non-interference principles discourage unilateral actions that could destabilize East Asia

When Li Qiang and Kishida exchanged congratulatory messages on the treaty's 45th anniversary in 2023, they weren't being ceremonial. They were acknowledging that this framework still defines the boundaries within which both governments operate, regardless of current geopolitical pressures. Yet public awareness remains strikingly uneven, with only 7.4% of Japanese respondents saying the treaty is currently functioning, compared to 34.6% of Chinese respondents in a 2023 poll. Much like British Columbia's entry into Canada, which hinged on a constitutional railway obligation, the 1978 treaty was built on foundational commitments that neither party could easily walk away from once enshrined in formal agreement.