The 1974 Mitsubishi Heavy Industries bombing ( ja, 三菱重工爆破事件) was a
terrorist
Terrorism, in its broadest sense, is the use of criminal violence to provoke a state of terror or fear, mostly with the intention to achieve political or religious aims. The term is used in this regard primarily to refer to intentional violen ...
bombing
A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy. Detonations inflict damage principally through ground- and atmosphere-transmitted mechanica ...
of the
Mitsubishi Heavy Industries
is a Japanese multinational engineering, electrical equipment and electronics corporation headquartered in Tokyo, Japan. MHI is one of the core companies of the Mitsubishi Group and its automobile division is the predecessor of Mitsubishi Mo ...
headquarters in
Tokyo
Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.468 ...
,
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
on 30 August 1974, killing eight people and injuring 376 others. The bombing was committed by the
East Asia Anti-Japan Armed Front
The was a Japanese New Left terrorist organization that existed from 1972 to 1975.
The EAAJAF self-identifies as a leftist group which espouses Anti-Japaneseism ideology of revolution against the Japanese state, corporations, and symbols of Jap ...
, a radical
far-left
Far-left politics, also known as the radical left or the extreme left, are politics further to the left on the left–right political spectrum than the standard political left. The term does not have a single definition. Some scholars consider ...
anti-Japanese organization, against Mitsubishi Heavy Industries for supplying the
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...
against
North Vietnam
North Vietnam, officially the Democratic Republic of Vietnam (DRV; vi, Việt Nam Dân chủ Cộng hòa), was a socialist state supported by the Soviet Union (USSR) and the People's Republic of China (PRC) in Southeast Asia that existed f ...
during the
Vietnam War
The Vietnam War (also known by #Names, other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vie ...
.
The 1974 Mitsubishi Heavy Industries bombing was the deadliest terrorist attack in Japan until the
Tokyo subway sarin attack
The was an act of domestic terrorism perpetrated on 20 March 1995, in Tokyo, Japan, by members of the cult movement Aum Shinrikyo. In five coordinated attacks, the perpetrators released sarin on three lines of the Tokyo Metro (then ''Teito Rapi ...
in 1995.
Background
The
East Asia Anti-Japan Armed Front
The was a Japanese New Left terrorist organization that existed from 1972 to 1975.
The EAAJAF self-identifies as a leftist group which espouses Anti-Japaneseism ideology of revolution against the Japanese state, corporations, and symbols of Jap ...
(; EAAJAF) was a
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
ese
far-left
Far-left politics, also known as the radical left or the extreme left, are politics further to the left on the left–right political spectrum than the standard political left. The term does not have a single definition. Some scholars consider ...
organization, influenced by the
New Left
The New Left was a broad political movement mainly in the 1960s and 1970s consisting of activists in the Western world who campaigned for a broad range of social issues such as civil and political rights, environmentalism, feminism, gay rights, g ...
movement. Founded in 1972, it espoused a
communist
Communism (from Latin la, communis, lit=common, universal, label=none) is a far-left sociopolitical, philosophical, and economic ideology and current within the socialist movement whose goal is the establishment of a communist society, a s ...
anarchist
Anarchism is a political philosophy and movement that is skeptical of all justifications for authority and seeks to abolish the institutions it claims maintain unnecessary coercion and hierarchy, typically including, though not neces ...
leanings. The EAAJAF viewed the
Empire of Japan
The also known as the Japanese Empire or Imperial Japan, was a historical nation-state and great power that existed from the Meiji Restoration in 1868 until the enactment of the post-World War II 1947 constitution and subsequent fo ...
as the "perfect evil" and condemned the
Pacific war
The Pacific War, sometimes called the Asia–Pacific War, was the theater of World War II that was fought in Asia, the Pacific Ocean, the Indian Ocean, and Oceania. It was geographically the largest theater of the war, including the vast ...
as an "aggressive war" committed by Japan. In 1971, the EAAJAF's predecessor organization had launched a campaign of non-fatal
bombing
A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy. Detonations inflict damage principally through ground- and atmosphere-transmitted mechanica ...
s against the Japanese state, especially targeting symbols associated with
Japanese imperialism
This is a list of regions occupied or annexed by the Empire of Japan until 1945, the year of the end of World War II in Asia, after the surrender of Japan. Control over all territories except most of the Japanese mainland (Hokkaido, Honshu, Kyus ...
, but in 1974 escalated its campaign to include the use of
violence
Violence is the use of physical force so as to injure, abuse, damage, or destroy. Other definitions are also used, such as the World Health Organization's definition of violence as "the intentional use of physical force or Power (social and p ...
.
On 14 August 1974, the EAAJAF tried to blow up the bridge over which
Emperor Hirohito
Emperor , commonly known in English-speaking countries by his personal name , was the 124th emperor of Japan, ruling from 25 December 1926 until his death in 1989. Hirohito and his wife, Empress Kōjun, had two sons and five daughters; he was ...
's royal train was travelling, which they code-named the "Rainbow Operation", but this was aborted because a member was spotted shortly before it was to be put into action. The following day
Mun Se-gwang
Mun Se-gwang (December 26, 1951 – December 20, 1974) was a Japanese-born North Korean sympathizer who attempted to assassinate South Korean president Park Chung-hee on August 15, 1974. The assassination attempt resulted in the deaths of Par ...
Chongryon
The General Association of Korean Residents in Japan, " ''
and a far-left militant organization tied to the EAAJAF, attempted to assassinate President
Park Chung-hee
Park Chung-hee (, ; 14 November 1917 – 26 October 1979) was a South Korean politician and army general who served as the dictator of South Korea from 1961 until his assassination in 1979; ruling as an unelected military strongman from 1961 ...
of
South Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ...
. Despite Mun's failure to kill Park, the attack soured the already fragile
Japan–South Korea relations
After the division of Korea, Japan and South Korea established diplomatic relations in December 1965, under the Treaty on Basic Relations between Japan and the Republic of Korea, with Japan recognizing South Korea as the only legitimate gover ...
and encouraged the EAAJAF's Wolf cell into committing new terrorist bombings in sympathy with Mun. The EAAJAF targeted
Mitsubishi Heavy Industries
is a Japanese multinational engineering, electrical equipment and electronics corporation headquartered in Tokyo, Japan. MHI is one of the core companies of the Mitsubishi Group and its automobile division is the predecessor of Mitsubishi Mo ...
, a large Japanese
corporation
A corporation is an organization—usually a group of people or a company—authorized by the state to act as a single entity (a legal entity recognized by private and public law "born out of statute"; a legal person in legal context) and r ...
which manufactured military weapons that were later used by the
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...
against
North Vietnam
North Vietnam, officially the Democratic Republic of Vietnam (DRV; vi, Việt Nam Dân chủ Cộng hòa), was a socialist state supported by the Soviet Union (USSR) and the People's Republic of China (PRC) in Southeast Asia that existed f ...
in the
Vietnam War
The Vietnam War (also known by #Names, other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vie ...
in the early 1970s.
Bombing
Members of the 'Wolf' () cell of EAAJAF planted two powerful home-made
time bomb
A time bomb (or a timebomb, time-bomb) is a bomb whose detonation is triggered by a timer. The use (or attempted use) of time bombs has been for various purposes including insurance fraud, terrorism, assassination, sabotage and warfare. They ar ...
s (containing 45
kilogram
The kilogram (also kilogramme) is the unit of mass in the International System of Units (SI), having the unit symbol kg. It is a widely used measure in science, engineering and commerce worldwide, and is often simply called a kilo colloquially ...
s of explosives) in a
flower pot
A flowerpot, planter, planterette or plant pot, is a container in which flowers and other plants are cultivated and displayed. Historically, and still to a significant extent today, they are made from plain terracotta with no ceramic glaze, wi ...
at the entrance of Mitsubishi Heavy Industries' head office block in the busy
Marunouchi
Marunouchi () is a commercial district of Tokyo located in Chiyoda between Tokyo Station and the Imperial Palace. The name, meaning "inside the circle", derives from its location within the palace's outer moat. It is also Tokyo's financial di ...
district of
Tokyo
Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.468 ...
. The EAAJAF gave a telephone warning to the people inside the building eight minutes before the explosion, but it was dismissed as a joke, and another warning came four minutes later after the first warning was ignored, but the
telephone exchange
A telephone exchange, telephone switch, or central office is a telecommunications system used in the public switched telephone network (PSTN) or in large enterprises. It interconnects telephone subscriber lines or virtual circuits of digital syst ...
still did not launch an evacuation procedure. One of the bombs failed to detonate but the other did, exploding at 12:45 p.m. (
UTC+9
UTC+09:00 is an identifier for a time offset from UTC of +09:00.
During the Japanese occupations of British Borneo, Burma, Hong Kong, Dutch East Indies, Malaya, Philippines, Singapore, and French Indochina, it was used as a common time with ...
), which was around lunchtime. Eight people died: five people were killed instantly (including two Mitsubishi employees) while another three died after being hospitalized shortly afterwards. An estimated 376 people were injured in the blast, with about 330 people brought to hospital, of which 116 were
Mitsubishi
The is a group of autonomous Japanese multinational companies in a variety of industries.
Founded by Yatarō Iwasaki in 1870, the Mitsubishi Group historically descended from the Mitsubishi zaibatsu, a unified company which existed from 1870 ...
employees. The explosion blasted all of the office block's glass up to eleven stories high, as well as glass from buildings opposite which included the headquarters of
Mitsubishi Electric
, established on 15 January 1921, is a Japanese multinational electronics and electrical equipment manufacturing company headquartered in Tokyo, Japan. It is one of the core companies of Mitsubishi. The products from MELCO include elevators an ...
, and was loud enough to be heard from
Shinjuku
is a special ward in Tokyo, Japan. It is a major commercial and administrative centre, housing the northern half of the busiest railway station in the world (Shinjuku Station) and the Tokyo Metropolitan Government Building, the administration ...
, over away. Vehicles and some trees in the streets were also destroyed.
Aftermath
The bombing caused a lot more damage than the EAAJAF expected due to the lack of evacuation, causing an outrage among the media. One editor said "This incident is a most atrocious challenge to our society. Society itself was the target and the victim." The ''
Japan Times
''The Japan Times'' is Japan's largest and oldest English-language daily newspaper. It is published by , a subsidiary of News2u Holdings, Inc.. It is headquartered in the in Kioicho, Chiyoda, Tokyo.
History
''The Japan Times'' was launched by ...
'' incited for a "show of public wrath" against the terrorists. However, rightist Prime Minister
Kakuei Tanaka
was a Japanese politician who served in the House of Representatives (Japan), House of Representatives from 1947 Japanese general election, 1947 to 1990 Japanese general election, 1990, and was Prime Minister of Japan from 1972 to 1974.
After ...
as well as leaders of leftist parties remained silent about the incident. Nervousness among the Tokyo population increased following two other bombings carried out by the group in the city in 1974, with the police still not having made arrests.
The members of EAAJAF were arrested on 19 May 1975. In 1987, Masashi Daidoji and Toshiaki Masunaga were convicted and
sentenced to death
Capital punishment, also known as the death penalty, is the state-sanctioned practice of deliberately killing a person as a punishment for an actual or supposed crime, usually following an authorized, rule-governed process to conclude that t ...
. Daidoji, leader of the former group's Wolf cell, said during court hearings that the bombing was "a mistake". In May 1999 while on death row, he apologized to the victims for the first time, saying "Our causing casualties is not something I can justify. I would like to apologize from the bottom of my heart." Daidoji died on 24 May 2017 at the
Tokyo Detention Center
Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.468 ...
.
The 1974 Mitsubishi Heavy Industries bombing was the deadliest terrorist attack as defined by modern standards that had occurred in Japan at the time, and remained the deadliest for over two decades until the
Tokyo subway sarin attack
The was an act of domestic terrorism perpetrated on 20 March 1995, in Tokyo, Japan, by members of the cult movement Aum Shinrikyo. In five coordinated attacks, the perpetrators released sarin on three lines of the Tokyo Metro (then ''Teito Rapi ...