for a long time, Japan has tried its best to describe itself as a “nuclear free country”. But in fact, the Japan US alliance established by the Japan US security treaty, the United States provides nuclear protection to Japan, and Japan accepts and relies on the “nuclear umbrella” of the United States. In this regard alone, Japan is not a truly “non nuclear state”. At the same time, Japan’s own nuclear technology and ambiguous nuclear tendency make Japan have great nuclear potential, which is considered as a “quasi nuclear country” by the international community. “If Japan wishes, it can quickly manufacture warheads and load them on intercontinental vehicles.”. The three non nuclear principles of

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and “do not possess, manufacture or transport nuclear weapons” are the basic principles of Japan’s defense policy, which aims to restrict Japan’s development of nuclear equipment.

for a long time after the war, under the shadow of the cold war, Japan put itself under the nuclear umbrella of the United States. Since the former Soviet Union’s strategic missiles have a range covering the whole of Japan and can hit major cities in the United States, the United States feels that the prediction system takes too long, so it is necessary to improve its early prediction radar. The nuclear confrontation between the United States and the former Soviet Union involves Japan. Using Japan’s territory to deploy ultra long-range radar that can make up for the deficiency of ballistic missile early warning system can make the U.S. nuclear strategic system more perfect. Using this early warning system, the early warning time for the United States to deal with nuclear war has been “doubled”. Regarding the fact that the United States has set up the ultra far radar of the nuclear strategic system in Japan, When replying to the Congress, the Japanese government authorities held that: “(1) ultra far radar is neither a nuclear weapon nor an indispensable thing for nuclear weapons. Therefore, it cannot be regarded as a part of the nuclear weapon system. (2) since China has no nuclear containment force and has to rely on the nuclear containment force of the United States, such detection facilities are conducive to China’s security.” Japan’s stance has actually changed its previous position on the “three non nuclear principles”, indicating that it welcomes the deployment of the US nuclear strategic system in Japan and is willing to use the US nuclear umbrella. At this time, the Japan US security treaty is already a “nuclear safety and security treaty”, because the US military stationed in Japan constitutes an important part of its nuclear strategic system. On July 5, 1974, Kojiro nenchang, elected from Okinawa Prefecture, announced the news of the training of “the U.S. military conducted the throwing of nuclear simulated bombs at the shooting and bombing shooting range on ijiang Island, Okinawa Prefecture”, but it was acquiesced by the Japanese government. Later, Japan also agreed to allow the US 7th Fleet carrying nuclear weapons to enter Japanese ports. The reason is that although it does not manufacture nuclear weapons, Japan allows nuclear weapons to exist on its territory.

on September 10, 1974, laroka, the former U.S. Defense Investigation Director of the 7th Fleet, testified at the hearing on nuclear weapons held by the military utilization Subcommittee of the joint Atomic Energy Commission of the United States Congress: nuclear weapons are not only equipped on aircraft carriers, but also mostly equipped on frigates, destroyers and other ships. These ships did not remove their nuclear weapons when berthing in Japan or other countries. It can be seen that Japan’s so-called “three non nuclear principles” is just a political and legal strategy to avoid the severe criticism of the peace constitution for the illegality of “nuclear”. Naturally, Japan under the nuclear umbrella no longer needs to be afraid of nuclear attack. In this way, it can use the nuclear power of the United States to protect its own security at any time. Moreover, Japan’s acceptance of the nuclear protection of the United States first means that Japan is closely connected with the world’s most powerful nuclear power. In the Pacific region, there are eight US Trident nuclear submarines carrying strategic nuclear weapons, 37 nuclear attack submarines carrying tactical nuclear weapons, 107 main surface warships of the Pacific Fleet, and 370 Air Force combat aircraft. These warships and aircraft carry or can carry tactical nuclear weapons at any time. In Japan’s mainland and surrounding waters, aircraft carriers and other ships with nuclear attack capability of the United States take Japan’s base as their home port. Nuclear submarines carrying strategic and tactical nuclear weapons can dock and enter and leave Japan’s ports, and cruise in the waters near Japan all year round; There are more than 100 F-15 and F-16 US warplanes capable of carrying tactical nuclear weapons in sanze and other bases in Japan. The flight radius of these aircraft can reach North Korea, China and the eastern coastal area of Russia, and the air refueling can reach most of China and the Far East of Russia. At the same time, Japan, which enjoys the multi-level and all-round nuclear protection of the United States, provides funds, materials, bases, communications, intelligence and other facilities and services for the military forces of the United States in the Western Pacific, including nuclear forces.

the nuclear strategic principle of the United States never promises not to be the first to use nuclear weapons, nor does it promise not to use nuclear weapons against non nuclear countries and regions. According to the US nuclear strategy, the nuclear protection provided by the United States to Japan is not only “nuclear defense capability”, but also “nuclear attack capability”. With the support and cooperation of Japan, the “forward deployment” nuclear forces of the United States in the Pacific, including Japan’s mainland and sea areas, can not only defend Japan, but also carry out nuclear deterrence and nuclear attack in Asia on this basis.

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although successive Japanese governments after the war claimed to adhere to the “three non nuclear principles”, the fact is that Japan is gradually moving towards nuclear armed forces, and Japan has long become a potential nuclear power outside the “nuclear threshold” recognized by the world. Vladimir biluos, a Russian Defense and security expert, believes that Japan can manufacture high-performance nuclear weapons within a year. Japanese critics have recognized that Japan has the conditions for the development of military materials and nuclear technology. In 1994, the Japan Atomic Energy Commission revised the long-term plan for nuclear energy research, development and application formulated in 1987, which put forward clearer objectives and requirements for the research and development of nuclear technology. On June 17 of the same year, when answering reporters in the diet, then Japanese Prime Minister Takeda said: “Japan is indeed capable of possessing nuclear weapons.”

on July 19, 1999, two ships filled with nuclear fuel secretly sailed from a British port to Japan. But there was no airtight wall, and soon there was news that the two ships had enough nuclear fuel to build 60 nuclear bombs. The world public opinion was in an uproar, and the strongest response was the Asian neighbors devastated by Japanese militarism in World War II.