What's the use of Naruto supporting ninjas?

In order to increase combat effectiveness, the "Support Ninja" in Naruto's mobile game can only be unlocked in the duel field by counting coupons. If you don't have a ninja, but you have unlocked it in duel field, you can use it in duel field, but there is a restriction that you can only use it in duel field.

Introduction and Origin of Ninja Ninja, like sushi and geisha, has become an international lingua franca. Whether authentic Japanese or foreigners learning ninja skills, their images of ninjas are usually: dressed in black, able to fly over walls, leap over cities, call the shots, change stars and fight, and use all kinds of grotesque hidden weapons. Although this image is not accurate, it is also very close. Ninja's job is mainly to carry out secret tactics, sabotage, assassination, collecting enemy frontline information, disturbing enemy reserve bases and other espionage activities for the Lord. Because you have to be anonymous before you die and live a dark life for life; You can't leave a few phrases in case you get caught in the future. So, when should the origin of Japanese ninja be traced back? No one dares to assert. However, in the secret book of Ninjutsu, it is recorded that Shoto Kutaishi (from the end of the 5th century to the beginning of the 6th century) had a ninja named Da Companion. 1, the evolution of the name of the ninja The name of the ninja began in the Edo period in Japan, but the history of the ninja began in a much longer time. It is said that in Japan, it was Prince Desheng who sent "Ninja" to complete the task for the first time. At that time, ninjas were called "smart and convenient". According to the time and place, there are various titles. The following are the titles of ninjas in various periods at that time: Asuka period: "Willing to be able"; Nara era: Scout; Warring States Period: There are many names. The most popular name is Luan Bo, which was named by Takeda Shingen. Edo Age: Ninja. Although it was formally established in the Edo era, it was from this era that Japan entered a peaceful period ruled by the Tokugawa family for a long time, and its activities on the historical stage became less and less. Due to the loss of the stage of activities, ninjas gradually disappeared on the stage of history. So much so that many ninja skills have been lost. The last record of ninja activities is that in the "Shimahara Rebellion" of 1637, ninjas fought as the deployment of the shogunate. 2, the origin of Ninjutsu Ninjutsu, also known as concealment. There are different opinions about the origin of Ninjutsu and Ninja. Some people in China think that Ninjutsu originated from the Five Elements of Han Dynasty in China, and later spread to Japan. Like karate, judo, Shaolin Temple boxing and other Japanese martial arts, Ninjutsu is a kind of martial arts with Japanese characteristics that gradually developed after the ancient martial arts from China were introduced to Japan. Wan Hai, the authoritative work of Ninjutsu, pointed out that the root of Ninjutsu thought came from China and Jiang Taigong during the Yin and Zhou Dynasties. It was he who first put forward the concept of Ninjutsu and wrote it in Liu Tao, a masterpiece handed down from ancient times. Later, Sun Wu, Sean and Han Xin successively perfected the theory of Ninjutsu. In particular, Sun Wu's The Art of War has been highly praised by the ninja class. At this time, Ninjutsu has basically formed the embryonic form composed of tactics, formation, yin and yang, skills and so on. With the spread of Ninjutsu to Japan, Ninja appeared and developed in Japan. The Japanese believe that the theoretical basis of Ninjutsu evolved from Sun Tzu's Art of War, which was introduced by China, and then developed into practicing Daoism and ambushing in the mountains, which is the so-called "wind, forest, fire and mountain". In the Heian period, after the rise of the samurai class, the art of war in mountain ambush was absorbed and developed. In the Yuan Ping era, Yuan Yijing successfully used the skill of ambush in the mountains and completed the theory of attack tactics. During the Southern and Northern Dynasties, Kusunoki Masashige developed defensive techniques. At this point, Ninjutsu and Wushu were separated into different systems and formally independent. Immigrants from China and North Korea are also closely related to the development of ninjas. Because ancient Japan was very backward, the Japanese government welcomed China immigrants with highly developed science, technology and culture to settle in Japan, so Koreans influenced by Chinese civilization were also welcome. The Japanese call these immigrants "naturalized people" (although welcome, they are still discriminatory. It is difficult for immigrants to enter the upper class, nor can they follow the language and culture of their original place of residence, so they have to change their names to Japanese. These ancient skilled immigrants brought a lot of advanced scientific technology and cultural knowledge to Japan, such as pottery making, armor and clothing technology, China martial arts and so on, which decisively promoted the development of Japanese Ninjutsu. Because ninjas mostly come from farmers at the bottom of society, not aristocratic soldiers. Therefore, as immigrants who are difficult to be accepted by the upper class, "naturalized people" have also entered the ninja industry in large numbers. "Naturalized people" usually settled in Kyoto, and then a large number of people moved to nearby Iga or Kaga to live, which is also the main reason for the abnormal development of Ninjutsu in the two places. For example, the famous Hattori Shimada Hanzo was born in China. His surname is Qin, and Qin's family crossed the sea from Wu in China at the end of the third century and the beginning of the fourth century (the traditional name of Japanese kimono is "Wu Fu", which was taken from Wu of Qin's family), and later it was changed to Hattori. Hattori Shimada Hanzo defected to Tokugawa Ieyasu and later moved to Edo. Legend has it that this ninja finally realized the true meaning of forbearance, which many generations of ninjas have never seen. So far, the Japanese have always called him the legendary Naruto who praised "Ghost Shimada Hanzo". This is a ninja world. In the world of Naruto, the profession of ninja is the dream of teenagers, just like the hunter in HunterXHunter and the pirates in One Piece! However, Naruto, the hero of this era, is different from Xiaogang and Lufei. They are self-taught. He graduated from Ninja School in Konoha Ninja Village (although he barely graduated, he was called the "poor student" of Wannian Hewei, Khan). Since childhood, the evil Kyubi no Youko fox has been sealed. Naruto, who has no parents, has been left out by the villagers, but he doesn't know why. He just wants to attract everyone's attention with all kinds of practical jokes, but people are farther away from him. Fortunately, teacher Ikaru still cares about him, so Naruto's character has not become distorted. He is always full of energy, loves to laugh and is super optimistic. In order to make more people recognize themselves, Naruto's goal is to become the fifth generation of Huo Ying! This is a very high goal. Huo Ying is one of the five strongest ninjas in the world and the leader of Konoha Ninja Village. Naruto doesn't care, but he is super confident that he will become a fire shadow one day. Work hard, Naruto! Naruto's companion is a teacher. This is a ninja world. In the world of Naruto, the profession of ninja is the dream of teenagers, just like the hunter in HunterXHunter and the pirates in One Piece! However, Naruto, the hero of this era, is different from Xiaogang and Lufei. They are self-taught. He graduated from Ninja School in Konoha Ninja Village (although he barely graduated, he was called the "poor student" of Wannian Hewei, Khan). Since childhood, the evil Kyubi no Youko fox has been sealed. Naruto, who has no parents, has been left out by the villagers, but he doesn't know why. He just wants to attract everyone's attention with all kinds of practical jokes, but people are farther away from him. Fortunately, teacher Ikaru still cares about him, so Naruto's character has not become distorted. He is always full of energy, loves to laugh and is super optimistic. In order to make more people recognize themselves, Naruto's goal is to become the fifth generation of Huo Ying! This is a very high goal. Huo Ying is one of the five strongest ninjas in the world and the leader of Konoha Ninja Village. Naruto doesn't care. At first, everyone didn't like each other for their classmates who could succeed one day. However, with the battle of * * * *, although we had a fight on our faces, we finally became good partners who recognized and trusted each other. As usual, there are cool and handsome Sasuke (who also shoulders the mission of The Avengers) and clever and lovely girl Muyingsakura among his companions, and there are cunning super Boss orochimaru, ruthless and bloodthirsty lonely killer, unwanted child I love Luo ... and other groups of Konoha students, both competing and helping each other. Although it is the traditional setting of juvenile comics, the characters and stories are wonderful! At first, we didn't like each other, but with the battle of * * *, although we still had to fight on the face, we finally became good partners who recognized and trusted each other.