It seems that the Japan also has been in the period of “loan wolf (terrorism)”.
The individual who has got the grievance makes ideation intensify and the cases which attain to terrorism are happening in succession. Former Prime Minister Abe shooting incident is typical.
A loan wolf is more dreadful than structure terrorism. because nobody can understand where the fellows run out. The structure terrorism is also fearful, on the other hand,their thought principle is known, their behavior is readable.
How should we just survive the period of loan wolf? You could not argue with the terrorist who kills people for an unrealizable reason. You will be damaged before the police comes, even though you call.
You cannot but use self-defense after all. “The period of loan wolf” means “the period which uses self-defense” for many good citizens.
If loan wolf is encountered ,you should consider escaping first of all. If you can not run away, you will fight with thirst for blood. This is actual although it is the way of thinking made bloody.
I would like to spread the art of self-defense. I want child, woman, and senior citizen to master very much . Terrorism suffering is reducible if the art of self-defense can be studied freely.         

(Kei Kitajima)