Aikido

 Aikido was made from the late Taisho to early Showa. Along with Judo, Karate, Kendo and so on, this is one of the leading martial arts in Japan in the early 21st century. The martial arts is mainly body comprehensive martial arts. After the end of World War II, which spread to the general public, largely spread in the world not only in Japan. Nage-waza (throwing techniques) and katame-waza (grappling techniques) are mainly in Aikido. Aikido is popular as a health method because everyone can start without the need for strong muscles. Aikido has been recognized as a self-defense. Aikido is performed by blending with the motion of the attacker and redirecting the force of the attack rather than opposing it head-on. This requires very little physical strength, as the aikidōka (aikido practitioner) "leads" the attacker's momentum using entering and turning movements. The techniques are completed with various throws or joint locks.

Karate

 Karate is a martial art characterized blow and was born in Okinawa in the Ryukyu Kingdom era.  There are two game style "Kata(forms)" and "Kumite(free practice). Kata means literally "shape" or "model." Kata is a formalized sequence of movements which represent various offensive and defensive postures. These postures are based on idealized combat applications. Sparring in Karate is called kumite. It literally means "meeting of hands." Kumite is practiced both as a sport and as self-defense training. Karate is known for its overseas. For example, Canada, Korea, UK, France and so on. Karate is divided into style organizations. These organizations sometimes cooperate in non-style specific sport karate organizations or federations. Examples of sport organizations are Amateur Organization of Karate(AOK), World Karate Federation(WKF), World Karate Confederation(WKC) and more. Organizations hold competitions (tournaments) from local to international level. Tournaments are designed to match members of opposing schools or styles against one another in Kata, sparring and weapons demonstration. They are often separated by age, rank and sex with potentially different rules or standards based on these factors. The tournament may be exclusively for members of a particular style or one in which any martial artist from any style may participate within the rules of the tournament.

Kendo

 Kendo is a modern Japanese martial art of sword-fighting based on traditional Japanese swordsmanship, or kenjutsu. Kendo is a physically and mentally challenging activity that combines strong martial arts values with sport-like physical elements.
 All waza (techniques) are parting shot of the armor (men, do, kote). You win by taking the ipponn (hitting the armor beautifully by waza) in the game. There is All Japan Kendo Federation(AJKF) in Japan. AJKF is Japan's largest Kendo organizations. It is a member of the Japanese Martial Arts Association, the Japan Amateur Sports Association, the Japanese Olympic Committee (JOC) and the International Kendo Federation (FIK). The organization established "Philosophy of Kendo" on March 20 in 1975. The content is "Kendo is the way of character-building through training of the sword."

Judo

 Judo was established in samurai society since the 12th century. Judo has evolved in the Edo period after the Warring States period. Now it has become one of the most widely practiced martial arts in Japan. The philosophy and subsequent pedagogy developed for judo became the model for other modern Japanese martial arts that developed from koryu (traditional schools). The worldwide spread of judo has led to the development of a number of offshoots such as Sambo and Brazilian Jiu-Jitsu. Practitioners of judo are called judoka.
 There are two game style "Kata(forms)" and "Randori(free practice)". There are three basic categories of waza (techniques) in Judo: nage-waza (throwing techniques), katame-waza (grappling techniques) and atemi-waza (striking techniques). Judo is most known for nage-waza and katame-waza. There is also ukemi-waza(break-falls techniques) to prevent injury.

Martial arts philosophy

 Loss of fighting spirit in the struggle for his martial arts is to be deprived of combat power. In other words, I give up or be a KO. Other loss of fighting spirit is to give up combat power against themselves or take away combat power. However, strictly speaking, the combat power and a transition may disappear unless there is life. In the struggle, "the ultimate loss of fighting spirit " is a "reconciliation" is the realization of. It is practically difficult. However martial arts is effective to realize "reconciliation". Finally, If human beings don't share established the rule, they lose the humanity.

Martial arts in Japan vs Martial arts in other countries

 The technology that people can kill the opponent, to protect oneself has developed in martial arts in other countries. It has been used in military. So ordinary people in other countries don't get these technology. But they know martial arts in Japan. For example, Judo, Karate and so on. In particular, Judo is popular in Europe.
 Japan origin in many martial arts. Therefore, martial arts in Japan are more popular than that in other countries. 

The history of martial arts in Japan

 People began to save the technology to combat. This is the birth of Martial arts(budo). All martial arts have had to fight on the battlefield. For this reason, most of the extant old martial arts, swords, spears, sticks, halberd, and dart, almost all have the technology. Some martial arts have method for producing explosives and how to make poison antidote. If people do not get the technology, martial arts are easily eliminated in passing the time. As a result now there are nine martial arts approved by the Nippon Budokan.
 Judo, Kendo, Karate, Aikido, Shorinji Kempo, Kyudo, Naginata, Wrestling, Bayonet way
These have been developed in Japan. Other martial arts have been developed in local.