Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History

Khalid Elhassan - January 29, 2025

The Japanese people, both inside Japan and in immigrant communities outside the home islands, had to deal with some bizarre extremist groups in the 1930s and 1940s. Take the group headed by a radical Buddhist preacher who experienced visions that convinced him he was Japan’s savior. He set up a group that sought to reform Japan via a campaign of widespread assassination. Or take the retired colonel who established a radical group among Japanese immigrants. He convinced thousands of fellow countrymen, even after Japan surrendered at the end of World War II, that their country had actually won the war. Those who proved skeptical were beaten up and murdered. Below are sixteen surprising and fascinating facts about those weird radical groups that sought to transform Japan, and even bend reality.

16. The Aptly Named “League of Blood”

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Nissho Inoue. Matthew Legare

In the years leading up to World War II, Japan was caught in a vice between the desire to preserve its heritage, and the need to modernize lest it succumb to Western imperialism, as most of Asia had already done. A toxic mix of nationalism and militarism took an already touchy situation and made it worse, ultimately leading to the decision to attack Pearl Harbor. En route, there was plenty of craziness, such as “The League of Blood” – a violent ultranationalist organization resembling HYDRA from the GI-Joe fictional universe, that planned to change Japan via murder. Its main targets were liberal politicians and rich businessmen. The group was headed by a crackpot Buddhist preacher named Nissho Inoue, who had experienced some mystical visions in the 1920s while wandering around China. That left him convinced that he had been chosen as Japan’s savior, and that the country needed a spiritual rebirth.

15. “Reforming” Japan Via Murder

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Prime Minister Inukai Tsuyoshi, murdered by naval officers associated with the League of Blood. Prabook

Inoue returned to Japan and opened a school whose curriculum was based on an agrarian philosophy that advocated the superiority of farmers over city workers, and rural life over urban. Inoue slowly began to radicalize his students. Within a few years, his school’s agenda morphed from mere education and into a training center for ultranationalists, who pined to make Japan great again by returning to the traditions of past centuries. At first, Inoue contacted Japanese naval officers who were livid that Japan had signed the 1922 Washington Naval Treaty, which limited Japan to a smaller navy than that of either Britain or the US. He also made inroads with radical right wing university students. In 1932, Inoue preached that Japan should be reformed with an assassination campaign. The ultimate aim of the targeted murders was to dismantle Japan’s secular government, and restore supreme power to the emperor.

14. An Ambitious List of Intended Assassination Victims

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Nissho Inoue, 1, and League of Blood members – only numbers 3 and 6 managed to actually assassinate their assigned target. Matthew Langere

Inoue and his disciples drew up a list of twenty liberal politicians and wealthy businessmen – pro Western types viewed as evil obstacles in the way of Japan’s nationalist rebirth. It was eventually decided that twenty targets might be too ambitious. So the number was reduced to ten, with more to be added later after the initial targets were eliminated. They were Prime Minister Tsuyoshi Inukai; former Prime Minister Reijiro Wakatsuki; former Foreign Minister Baron Kijuro Shidehara; former Finance Minister Junnosuke Inoue; Prince Kimmochi Saionji, a trusted advisor of the Emperor; Viscount Nobukai Makino, Lord Keeper of the Privy Seal; Iesato Tokugawa, President of the House of Peers; Railway Minister Takejiro Tokonami; Baron Takuma Dan, director-general of the Mitsui Zaibatsu; and businessman Seihin Ikeda, director of the Mitsui Bank. Then, with the slogan “one person, one kill“, Inoue’s killers fanned out to remake Japan in their desired image.

13. The League of Blood Turned Out Not to be as Bloody as It Wanted to Be

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
League of Blood members await trial. Wikimedia

Members of the League of Blood were dedicated and bloodthirsty. Fortunately for their victims, however, they were relatively inept when it came to murder and the actual shedding of blood. As things turned out, of those targeted for assassination, group members managed to slay only two. They killed former Finance Minister Junnosuke Inoue in February, 1932, and industrialist Takuma Dan, director-general of the Mitsui Holding Company, a month later. Both assassins were immediately arrested on the spot. Inoue turned himself in to the police, who treated him with respect as a “patriot”.

12. Getting Away With a Slap on the Wrist for Murder

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Nissho Inoue in later years. Pinterest

In May, 1932, Japanese Navy officers associated with the League of Blood assassinated Prime Minister Inukaye Tsuyoshi. Inoue and his co-defendants used their highly publicized criminal trial as a platform to broadcast their radical ultranationalist philosophy. What they had to say fell on quite a few receptive ears. Indicative of Japan’s weakening democracy, many sympathized with the killers, and most of them got off with light sentences. It was a significant step on the road to the erosion of the rule of law in Japan. As to the mastermind, Inoue was sentenced to life in prison in 1934, but was freed in a general amnesty in 1940. After WWII, US occupation authorities tagged him as a fascist, and barred him from politics. Inoue was rehabilitated, however, after the occupation ended, and spent the rest of his life involved in radical right circles, until his death from a stroke in 1967.

11. Japanese Radicals in Brazil

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Japanese immigrants hard at work in a Brazilian coffee plantation. Historic Museum of Japanese Immigration

The League of Blood that terrorized Japanese politicians and strove to push the country into wars that ended up catastrophically for Japan was bonkers. However, it was just one of a number of loony (and lethal) Japanese nationalist societies. An even odder one emerged during and after WWII in, of all places, Brazil. South America does not usually come to mind when people think of WWII. Nor does it often conjure images of fanatical Japanese, refusing to accept that their country had been defeated. However, South America’s biggest country, Brazil, witnessed just that during the war and in the years after its conclusion. The country was shaken by fanatical Japanese immigrants who formed a group that waged a campaign of terror against other immigrants deemed disloyal to Japan.

10. From a Catholic Charity to an Imperial Cult

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Japanese officials aboard USS Missouri in Tokyo Bay, about to sign their country’s surrender on September 2nd, 1945. Naval History and Heritage Command

After WWII war ended with Japan’s surrender, the radical Japanese immigrants’ definition of “disloyalty” came to include the mere utterance of the fact that Japan had surrendered. Ironically, Brazil’s Japanese radical immigrants formed a terrorist organization, Shindo Renmei (“League of the Way of Emperor’s Subjects“), out of what had started off as an innocent charity. It was neither the sole nor first organization founded by Japanese immigrants in Brazil. All such organizations, with the notable exception of Shindo Renmei, were innocent entities that were formed to offer mutual support for the Japanese immigrant community. One such was Pia (“Pious”) a charity founded by Japanese Catholics, with the approval of both the Catholic Church and Brazil’s government, to help the poorer immigrants. One of the charity’s more active volunteers was a former Japanese Army colonel, Junji Kikawa, who eventually came to head Shindo Renmei.

9. Denial of the Reality of Japan’s Surrender

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Colonel Junji Kikawa in traditional ceremonial dress, left, and in military uniform, right. K-Pics

In 1942, violent clashes erupted between Japanese immigrants and local Brazilians. As a result, Colonel Kikawa decided to split from the innocent Pia and form the not-at-all innocent Shindo Renmei, which urged Japanese-Brazilians to engage in sabotage. That began a dive down a rabbit hole of crazy that terrified Kikawa’s fellow immigrants, and bewildered and alarmed Brazil and the Brazilian government. During WWII, Japan fought tooth and nail. Despite that, the conflict ended in abject defeat, with the country forced to throw in the towel and surrender in 1945. The shock of defeat sent many Japanese into paroxysms of grief, and quite a few around the bend and into denial and madness. For them – especially for those outside the country who did not get to see with their own eyes enemy troops occupying Japan – news of the surrender was “fake news”.

8. Brazil Was and Remains Home to the Largest Japanese Population Outside Japan

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Japanese poster urging immigration to Brazil. Historic Museum of Japanese Immigration

Most Japanese, in Japan and around the world, eventually came to their senses and accepted reality. Many, however, continued to resist facts. Thus, thousands of Japanese soldiers in isolated locales around the former Japanese Empire continued to fight for months, years, or even decades after the war ended. Some were innocent cutoff troops, who had not gotten the memo. Others were just stubborn jerks. In Brazil, which hosted a sizeable Japanese immigrant community, a radical group sprang up to terrorize people into denying that Japan had surrendered. Brazil hosts the largest Japanese population outside of Japan, with over 1.5 million nationals or naturals of Japanese ancestry living there. Significant numbers of Japanese began to arrive in Brazil early in the twentieth century. By 1940, the country had about a quarter million Japanese immigrants and their descendants. Most were concentrated in the coffee plantation region of Sao Paulo State.

7. Alienating Japanese Immigrants Via Forced Assimilation

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Meeting of Japanese immigrant clubs in 1940. Sao Paulo Museum of Immigration

Nearly all Japanese immigrants in Brazil were hard workers, who kept themselves busy as they productively engaged in the innocent pursuit of creating a better life for themselves and their families. However, assimilation was difficult. Brazil was a completely different country with a different language, religion, customs, climate, and food. So quite a few reacted by becoming hyper-Japanese, and embraced their birth country’s traditions, mores, and nationalism, with a fervor that exceeded that of those who actually lived in Japan. In the 1930s, Brazil’s government embarked on a course of forced assimilation, which effectively banned Japanese language media. Since many Japanese could not speak Portuguese, they were effectively cut off from news beyond their immediate immigrant community.

6. The Severe Isolation of the Japanese in Brazil

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Japanese immigrant family in Sao Paulo, Brazil. Wikimedia

Brazil joined the Allies in 1942, and declared war on Japan. That deepened the Japanese immigrants’ isolation. All communication with Japan was severed, and no new Japanese were admitted. The immigrants’ radios were confiscated. Those in the more urban coastal areas, with easy access to news, were expelled and relocated to the more rural interior, where news was quite limited. Severed from the outside world and reliable news, Brazil’s Japanese immigrant community became ripe for, and ready recipients of, unreliable news. As a result, many were hurled headfirst into a world of alternative facts – one in which Japan was winning WWII. By the time the war ended in 1945, many Japanese-Brazilians, innocent of the world beyond their immediate circle, were exceptionally vulnerable to bad information. They sincerely believed that Japan had won the war. Those who disagreed or said any different were subjected to rough – at times lethally rough – treatment.

5. The Birth of Shindo Renmei

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Japanese school in Cafelandia, Sao Paulo State, 1938. National Diet Library, Japan

The birth of Shindo Renmei can be traced back to a wave of violent clashes that erupted in 1942 between native Brazilians in rural Sao Paulo, and the Japanese immigrants in the vicinity. So former Japanese Army Colonel Junji Kikawa left an innocent Catholic charity in which he had been active, to found Shindo Renmei, as a self-defense organization for Japanese immigrants. Kikawa urged his followers to protest their mistreatment with steps such as ceasing the production of peppermint, which included ingredients used in the manufacture of explosives, and to stop making silk, a vital wartime material for making parachutes. He also advocated more direct steps, such as sabotage. By 1945, Shindo Renmei had a headquarters in Sao Paulo, and 64 branches in various Brazilian localities that hosted Japanese immigrant communities.

4. From Mutual Protection to Madness

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Shindo Renmei members, who organization insisted that Japan had won WWII. BBC

During WWII, Shindo Renmei took a radical turn towards ultra-nationalism. With most Japanese-Brazilians cut off from reliable news, Colonel Kikawa and his followers stepped in to exploit their innocent countrymen. They filled the information vacuum with “news” that amounted to little more than wishful thinking. As Japan reeled from defeat after defeat in real life, Shindo Renmei told Brazil’s Japanese immigrants that Japan was marching from triumph to triumph. The claims included a decisive Japanese victory in Okinawa, where America lost 400 warships. “Victory” was secured in no small part by a Japanese super weapon, the “High Frequency Bomb”, which killed Americans by the hundreds of thousands and forced the Allies’ unconditional surrender. Many believed that, or if they did not, they knew better than to say so. If for no other reason than that Shindo Renmei also took it upon itself to punish “defeatists” in the Japanese immigrant community.

3. Persecuting Those Who Admitted That Japan Had Surrendered

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Japanese immigrant family in Brazil, 1944. Sao Paulo Immigration Museum

Those who voiced doubts about how well the war was going for Japan were shunned, boycotted, and sometimes violently assailed. Shindo Renmei dismissed Japan’s surrender as “fake news” and American propaganda, and redoubled its efforts to punish those who said otherwise. According to Colonel Kikawa and his followers, Japanese immigrants were divided into two camps: good guys, and bad guys. There were the virtuous Kachigumi (“Victorious”), who knew that Japan had won the war. They were mostly the poor and poorly educated. Then there were the vile Makegumi (“Defeatists”), also pejoratively labeled “dirty hearts”, who bought the fake news about Japan’s defeat. The latter tended to be the better off and better educated immigrants. They had better access to information, and could differentiate between reliable and unreliable news. However, even those who did not believe Shindo Renmei were terrorized into toeing the group’s line, or at least into staying silent.

2. Preparing Victory Parades in the Belief That Japan Had Won WWII

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Colonel Junji Kikawa. Imgur

By the time WWII ended, Shindo Renmei had about 50,000 followers. They believed their leaders’ claims that Japan had won the war, and that the victorious Japanese were sending an occupation force, which should arrive any day now, to govern the defeated Brazilians. Group members went on a buying spree that emptied local shops of red and white cloth, intended to make Japanese flags, in order to welcome Brazil’s new overlords. The situation was further complicated by the circulation of fake newspapers and magazines peddled by charlatans. The fake media included articles about Japan’s “great victory”; the arrival of Japanese occupation troops in America; photographs of President Truman bowing to Emperor Hirohito; and coverage of the trial of General Douglas MacArthur for war crimes. The charlatans did not do it just for kicks and giggles: they made a bundle selling the duped Japanese immigrants land in the newly “conquered territories”.

1.     From Madness to Murder

Crazy 1930s-40s Extremists Who Tried to Rewrite Japan’s History
Japanese Olympic team that visited Brazil. Museum of Japanese Immigration to Brazil

Those who dared doubt Shindo Renmei’s assertions of Japan’s victory were beaten up or murdered. By the time it was over, dozens were killed. In 1946, Japan’s new government prepared documents for distribution in Brazil, outlining reality and declaring that Japan had surrendered. Shindo Renmei dismissed that as fake news, and beat up or murdered Japanese immigrants caught reading or distributing the documents. To reduce the violence, Brazil’s government prohibited newspapers from publishing news of Japan’s defeat, and ordered the term “unconditional surrender” removed from official communications. Things then gradually simmered down. A last gasp occurred in 1950, when Japan’s Olympic swimming team visited Brazil. When its members expressed shock at the idea that Japan had won the war, diehards claimed that the athletes were actually Koreans masquerading as Japanese. That was so ludicrous, that it eroded Shindo Renmei’s last remaining support, and the organization soon vanished into history’s dustbin.

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Where Did We Find This Stuff? Some Sources and Further Reading

Discover Nikkei – Shindo Renmei, a Dark Chapter in the History of Japanese Immigration in Brazil 

History Collection – True Believers: 10 Japanese Holdouts Who Did Not Surrender After World War II Ended

Lesser, Jeffrey – Negotiating National Identity: Immigrants, Minorities and the Struggle for Ethnicity in Brazil (1999)

Matthew Legare – Terror in Japan: The October Plot, Blood Brotherhood, & May 15 Incident

Modern Asian Studies, Vol. 35 No. 3 (Jul. 2001) – Nationalist Extremism in Early Showa Japan: Inoue Nissho and the ‘Blood Pledge Corps Incident’, 1932

Shimazu, Naoko – Nationalisms in Japan (2006)

Sociedade Brasileira de Bugei (SBB) – Shindo Renmei [Portuguese]

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