Although Japan has long been thought to be a safer country than any other advanced countries and to have nothing to do with terrorism, there has been terrorism in Japan domestically, not internationally.
In March of 1995, an armed cult group, called Aum-Shinrikyo, diffused sarin in Tokyo Metro cars while the trains stopped at stations in or near the Kasumigaseki government office district to attack Japan's government. This insane cult group appealed to and recruited some of well-educated young people, especially people who had majored in science and engineering. They built a chemical plant near Mt. Fuji to produce sarin, falsely insisting that it was a chemical fertilizer plant.
Japan and the U.S. revised their security treaty in 1960. Public opinion on it was divided, and a few of young people turned so much radical and violent. In 1970, they hijacked a Japan Airline aircraft and took passengers and crew hostage in pursuit of their political purpose. At that time, one young Representative, YAMAMURA Shinjiro, volunteered to be held hostage for the passengers to be released. This reminds me of Bushido, sort of Japanese chivalry.
At this moment, two Japanese men are being held hostage by so-called "IS" demanding a ransom. The international community does not consist of only good-natured people. As a Japanese, I feel sorry that Japanese still fail to revise the Constitution established under the Allies' strong influence.