was a Japanese politician and chairman of the Japan Socialist Party from 23 March 1960 until his assassination the same year. Known for his large stature and powerful voice, he tirelessly toured the country delivering speeches, earning him the nicknames "speech-making everyman" (enzetsu hyakushō), "human locomotive" (ningen kikan-sha), and the affectionate "Numa-san".
In the prewar years, Asanuma was a forceful advocate of socialist policies and tenant and farmer rights. During World War II, Asanuma aligned himself with the Imperial Rule Assistance Association and supported Japan's war in Asia. In the postwar period, Asanuma resumed forceful advocacy of socialism and sharply criticized the U.S.–Japan alliance. During visits to China in 1957 and 1959, he publicly expressed deep remorse for Japan's wartime invasion and aggression against the Chinese people and declared that "American imperialism is the common enemy of the peoples of Japan and China". These positions made him a highly polarizing figure in Japan.
Despite his leftist politics, Asanuma was known for his personal reverence for the emperor, maintaining a kamidana in his modest apartment and performing daily rituals there. He lived simply in public housing for decades and was popular among working-class voters for his approachable "everyman" style.
In 1960, Asanuma was assassinated with a wakizashi, a traditional short sword, by 17-year-old far-right ultranationalist Otoya Yamaguchi while speaking in a televised political debate in Tokyo. His violent death was seen in graphic detail on national television by millions of Japanese, causing widespread public shock and outrage.
Early life and education Asanuma was born on 27 December 1898 in the village of Kamitsuki on the island of Miyake-jima, a remote volcanic island that is administratively part of Tokyo, as the illegitimate son of Hanjirō Asanuma (1861–1951), the village headman, and his concubine Yoshi Asaoka.
Asanuma's mother raised him on Miyake-jima until he was about 13 years old. In his memoir, Asanuma recounted a childhood incident from his time on Miyake-jima, when he was in the fifth or sixth grade of elementary school (around ages 10–12). On the way back from swimming with school friends, he was taunted with the challenge, "Can you cross that trough?" After his cousin Iguchi Tomoichi crossed first, Asanuma followed, not wanting to be outdone. Midway across the toi, a wooden water trough suspended over a deep valley roughly 60–90 meters high (several dozen jō) and spanning about 30 meters across, he squatted down as a playful show of bravado, picked up a small stone inside the trough, and dropped it into the valley below.
When his mother, who had been working in the fields, later heard about the reckless stunt, she scolded him so fiercely that "fire seemed to shoot from her eyes." Terrified, he fled outside and, upon returning home later, hid inside a straw sack. He described his mother as strict yet devoted, raising him carefully under challenging conditions.
His father, Hanjirō Asanuma, later remarried Inoue Hisa and moved to Sunamura (now part of Kōtō, Tokyo), where he became a dairy farmer. Upon this remarriage, Hanjirō officially recognized Inejirō as his son and brought him to live in Tokyo. He attended what was then Tokyo Prefectural Third Middle School (now Tokyo Metropolitan Ryōgoku High School), In his first school speech contest (delivered on the chemistry stairs), he failed badly and swore off public speaking. He was inspired later by lectures from politicians like Korehiro Kurahara.
Asanuma enrolled in a preparatory course at Waseda University in 1918. He rejected his father's wish that he become a doctor, leading to a temporary estrangement.
In his memoir, Asanuma recalled his father's strong reaction when he announced his plans after graduating from Tokyo Prefectural Third Middle School in 1916:"In Taishō 5 , after graduating from Prefectural Third Middle School, I told my father, 'I want to enter Waseda University and become a politician.' He scolded me severely. My father said, 'Politicians are the type who squander the family fortune and end up ruining the household—become a businessman, or go to Keio's medical school and become a doctor.'"To support himself, he worked at a stationery company run by a friend, where he made fountain pens. During his university years, he belonged to the Oratorical Society and the sumo club (making use of his strong physique), and he also competed in races with the rowing club. He later recounted that the university's founder, Ōkuma Shigenobu, had praised his build.
Asanuma often reflected on Miyake-jima's long history as a place of exile for political dissidents and criminals such as the samurai Minamoto no Tametomo. In his memoirs, he listed specific exiles whose remnants he saw as a child, including prisons still visible in Igaya Valley, and noted cultural influences from figures such as the loyalist scholars Takeuchi Shikibu and Yamagata Daini, the painter Ei Itchō, and the kabuki actor Ikushima Shingorō. He jokingly referred to himself as a “descendant of exiles” and recounted that his father, as village headman, had learned Chinese classics such as Nihon Gaishi and Jūhasshi Ryaku from an exiled scholar. A local historian and friend, Etsutarō Asanuma, once told him that his vigorous fighting spirit in the Diet must come from having Tametomo's blood in his veins, to which Inejirō replied that being called a “modern-day Tametomo” felt a bit ticklish.
He also recounted his father's deep anguish over his son's leftist activities while serving as village headman. The tension increased during Inejirō's conscription examination the following year. A military policeman had traveled from Tokyo to monitor him. As village headman, Hanjirō was responsible for conducting the examination himself. Distressed by the surveillance and his son's leftist activities, Hanjirō considered resigning his post. Inejirō persuaded him not to, telling him that "there was no need for parents to bear responsibility for their child’s ideas."
While still in college, Asanuma became involved in various forms of leftist activism. Among other activities, in 1919 he founded the "Builders League", which studied the works of English socialists, worked for Russian famine relief, and protested against military-related research being conducted at Waseda.
During a protest rally against a student group cooperating with the military (the Waseda Military Research Group), he gave a speech and was physically assaulted by athletic club members and right-wing groups (Waseda University Military Research Group Incident). When the Great Kantō Earthquake struck, after attending a meeting in Gunma Prefecture, he tried to reach the Ashio Copper Mine but was arrested en route by soldiers. In Ichigaya Prison he provocatively demanded books from the guards, was beaten unconscious, handcuffed for a week, and forced to polish his own handcuffs as punishment.
Political career
Asanuma graduated from Waseda University's department of Political Economy in 1923. On 1 December 1925, at the age of 26, he was appointed secretary-general of Japan's first unified proletarian party, the Farmer-Labour Party, but the party was forcibly dissolved by the government just one hour after its formation, citing the authority of the recently passed Peace Preservation Law.
In 1926, Asanuma was one of the main founders of the similarly named Japan Labour-Farmer Party, as part of his efforts to link urban labor movements with rural peasant's movements. However, Asanuma left the party after it split into right, center, and left factions, and became involved in tenant organizing and the Labour-Farmer movement. In 1932, the fragmented proletarian parties were united to form the Social Masses Party, which Asanuma also joined.
Shift to National-Socialism and the war period
Deeply admiring secretary-general Hisashi Asō's character, he supported Asō's national-socialist line aiming for social reform through cooperation with the military. Thereafter, Asanuma took a position supporting the military's war policies. Representing the Social Masses Party, Asanuma was elected to the Tokyo City Council in 1933 and to the House of Representatives for the first time in the 1936 Japanese general election.
In 1938, when the Japanese Diet passed the State General Mobilization Law and other bills, Asanuma, representing the Social Mass Party, spoke in favor of them and served as a member of the National Mobilization Deliberation Council.Zhu, Tingguang (朱庭光). *Waiguo Lishi Mingren Zhuan: Xiandai Bufen, Xia Ce* [Biographies of Foreign Historical Figures: Modern Section, Vol. 2]. Chongqing: Chongqing Chubanshe, 1984, pp. 425–432. (in Chinese)
In 1939, Asanuma participated in a Japanese parliamentary delegation to the Inter-Parliamentary Union conference in Oslo, Norway (August 1939), traveling through the United States and Europe from June to October. During the voyage, he read extensively from Ikki Kita (including History of Chinese Revolution) and held frequent discussions with Reikichi Kita (younger brother of Ikki Kita, also a delegation member). He expressed strong admiration for Ikki Kita's passionate nationalism and for Shūmei Ōkawa. After finishing Ōkawa's History of Japan's 2,600 Years, he noted that its passionate advocacy of renewal and patriotic fervor "feels as though it is permeating my own body." These readings reinforced his vision of a new East Asian order.
On 30 September 1939 he wrote that whether called the East Asian League theory, the New Order in East Asia, or the East Asian Cooperative Body, it was "a new Sonnō Jōi [Revere the Emperor, Expel the Barbarians] theory" and "by no means so-called imperialism," but rather "the establishment of a new Eastern spirit and a new order upon the foundation of Nationalism and Nationalism." He observed that some Japanese viewed Europe's war as "a heaven-sent blessing for Japan," yet insisted Japan must prepare for what came next by cultivating "autonomous and independent strength" and that "ethnic totalitarianism" should evolve into "supra-ethnic regionalism." Regarding China, he stated that Chiang Kai-shek "has not awakened to this Eastern spirit," while Wang Jingwei "has awakened to it and is cooperating with our country with an anti-communist spirit in order to revive the spirit of the Chinese revolution." He also remarked that Japanese politicians needed far better knowledge of foreign political conditions, since Japan's politics could no longer be discussed apart from world trends, while still stressing that Japan possessed superior qualities that must be fully utilized.
During the voyage, Asanuma also recorded conversations with foreign passengers concerning Soviet Russia, the Bolsheviks, Stalin, and the Russian Revolution. He explicitly introduced these passages as accounts of things he had "heard from foreigners" aboard the Gripsholm, rather than as his own political judgments. Among the material he recorded were accounts of repression under the Bolsheviks, as well as antisemitic claims concerning Jewish involvement in revolutionary violence and Soviet politics. He also recorded an argument that Russia had "already turned back from communism" and had become more national and ethnic in character.