Bin Akao (赤尾敏, Akao Bin; 15 January 1899 – 6 February 1990) was a Japanese far-right (uyoku) politician who served as a member of the House of Representatives of Japan during World War II. He was arrested 25 times for political activities.

Akao was cofounder and first president of the Kenkokukai and became one of the leading ultranationalists in Japan during the 1920s. Akao was elected to the House of Representatives as an independent in 1942 and espoused a unique type of Japanese nationalism characterized by support for the United States and opposition to the Pacific War. Akao founded and became the first president of the far-right Greater Japan Patriotic Party in 1951 and continued to adamantly champion pro-United States, pro-British, and anti-communist stances in post-war Japan. He was known for his fiery street corner speeches, often delivered from noise trucks adorned with the Japanese flag, American flag, and Union Jack. He never held a salaried job, entering politics in his early twenties, and continued street activism into his nineties.

Members of the Greater Japan Patriotic Party, both aged 17, were responsible for the 1960 assassination of Japan Socialist Party chairman Inejirō Asanuma and the Shimanaka incident. Akao, who was present at the Hibiya Public Hall when Otoya Yamaguchi fatally stabbed Asanuma, publicly praised the act; newsreel footage from Mainichi News recorded him saying the assassin "did well" and calling him "great," while a contemporary report quoted him describing Yamaguchi as "a paragon of Japanese virtue" and Asanuma’s death as "heaven-sent punishment." Akao was questioned and temporarily arrested in connection with both incidents, but was never charged with directing either attack.

Bin Akao was born on 15 January 1899 in Higashi Ward, Nagoya, the son of a hardware dealer and liberal intellectual who had shifted from textiles to managing diverse businesses including hardware, charcoal sales, fishing, and ranching. As a child, Akao was sickly and contracted tuberculosis while a student at Aichi Third Junior High School (from which he later dropped out). Inspired by a teacher's story of Toyotomi Hideyoshi rising from humble origins to unify Japan, Akao dreamed of becoming prime minister through study and effort.

To aid his recovery, he was sent to manage a farm owned by his father on the island of Miyakejima. While on the island, Akao became acquainted with Inejirō Asanuma, the future chairman of the Japan Socialist Party, as well as Inejiro's distant relative Michio Asanuma, who would later become a member of Akao's Greater Japan Patriotic Party. On the farm, Akao sought to create a utopian society by implementing a primitive form of agrarian communism based on the ideals of the "New Village Movement" advocated by poet-philosopher Saneatsu Mushanokōji. In particular, the produce of the farm was distributed in equal shares to all workers on the farm, regardless of class or social standing. Novelist Rohan Koda sympathized with his ideals and met him. However, Akao's neighbors on the island felt threatened by his practices, and managed to swindle the farm from him through legalistic maneuvers. Disillusioned by the failure of his experiments with communism, Akao returned to the mainland and settled in Tokyo, where he began to dabble in socialism under the influence of Toshihiko Sakai, Hitoshi Yamakawa, Sakae Osugi, and Motoyuki Takabatake. He also engaged briefly in publishing. Akao was arrested and imprisoned for a speech critical of Japan's Emperor system after being conscripted into military service, and later for attempted extortion when demanding funds from local capitalists (receiving a sentence of one year and six months). While in prison, Akao became disillusioned with the left-wing movement in Japan (partly due to the attitude of former comrades) and soon abandoned left-wing politics as a whole.

In 1926, Akao "converted" (tenkō suru) to ultranationalism while still imprisoned, embracing what he called "emperor system socialism," and began his foray into right-wing Japanese politics. Thereafter, he became a vocal opponent of the Soviet Union and communism. That year, Akao became cofounder and president (later also associated with roles such as secretary-general) of the Kenkokukai (National Foundation Society; later evolving into or associated with the Greater Japan Imperial Rule Association / Dai Nippon Kōdō Kai), a major ultranationalist organization of the 1920s that ultimately reached a nationwide membership of around 120,000. To counter May Day, he organized the successful "National Foundation Festival" (建国祭) with support from figures like Sadao Araki and Kiichirō Hiranuma. Akao was a close associate of legal scholar Shinkichi Uesugi, who allowed him to run the Kenkokukai from his home after the withdrawal of several prominent members left the organization without the means to fund their headquarters. Around 1933, the group proposed a new holiday, the "Plum Festival" (梅の節句), inspired by the Kigensetsu, complete with dolls honoring Emperor Jimmu at the top, though it did not gain popularity. He also served as a director of the International Anti-Communist League (Kokusai Hankyō Remmei).^{[citation needed]}

One consistent aspect of Akao's thought was his respect for the power of the United States and Britain, having opposed the Pacific War from a nationalist perspective on the grounds that the United States was too powerful for Japan and therefore that fighting a war with it was foolhardy and played into Soviet communist strategy.

In the 1942 election, Akao ran for the Tokyo 6th district seat in the National Diet as a "non-recommended candidate," meaning he was not recommended by the single national political party, the Imperial Rule Assistance Association (IRAA). Nevertheless, Akao won the election and received the second most votes in Tokyo and the fourth most votes of anyone in Japan. Like other independent candidates, Akao was forced to join the Imperial Rule Assistance Political Association after winning his seat, but he was expelled from that organisation after publicly rebuking Prime Minister Hideki Tojo in June 1943.