Kodachi is a Japanese sword shorter than Daito (long sword) and slightly longer than tanto. Its blade is 40 to 65 cm long. Its size allowed the samurai to pull it out very quickly. It was used where movements were restricted, or in a body-to-body attack. Preferred weapon by the samurai, who relied mainly on their speed. Very convenient for protection, therefore called "the sword that is a shield".

During the Edo Period, the Tokugawa Shogunate was also allowed to be worn by non-samurai, usually merchants.

Kodachi, unlike Wakizashi, has a fixed length, also the curve of the blade is larger and the handle is longer.

Tanto is a samurai dagger, which was designed and used primarily as a stabbing weapon but also for finishing off opponents, cutting off heads, etc. and never as a knife. The edge can be used for slashing as well. Sometimes tanto was worn in daishho as a second sword. Tantos were used mostly by samurai, but they were also worn by doctors and traders as a weapon of self-defense. High society women sometimes also wore small tantos (called kaiken) hidden in an obi (kimono belt) for self-defense or suicide. A dummy tanto with a wooden is used for training in such martial arts as aikido, judo and karate. According to modern rules in Japan, tanto is recognized as a national cultural treasure - one of the variants of the Japanese sword. 

Wakizashi is a short traditional Japanese sword. Mainly used by samurai and worn on the belt. The length of the blade is from 30 cm to 61 cm. The blade is sharpened on one side, slightly distorted. It is usually worn with a katana in the samurai's belt.

In ancient Japan, a sword with a blade length of more than two shaku (60.6 cm) was considered a katana, and less than 2 shaku - a wakizashi.

Wakizashi is made of various shapes and lengths, usually thinner than a katana. 

Samurai used wakizashi as a weapon when the katana was inaccessible or unusable.

Wakizashi were always carried as a samurai's personal weapon. Bushi often called this sword the "guardian."

Experienced samurai used wakizashi in battle as a second weapon - to strike unexpected blows. The katana was held in the main hand and served as the main weapon.

Wakizashi was also used to perform ritual suicide - sepuku, if the samurai did not have a specially designed dagger kusungobu.

Kano Jigoro is the creator of judo, the first Japanese martial art to gain widespread international recognition, and the first to be recognized as an official Olympic sport.

Educators of the new innovations presented to Jigoro Kano should be used on white and black belts and be introduced to the dans to show the relative seniority of the average sportsman given a martial art. Kano also introduces some well-known mottos such as: "Maximum efficiency with minimum improvement" and "Shared wealth and benefit".

He was born on October 28, 1860 in Mikage, in the Kobe region. In 1871, Jigoro's family moved to Tokyo. As a child, Jigoro was a weak and sickly, the diseases followed one after another. Despite the doctors' advice, Kano decided to do something to improve his health and at the same time learn to defend himself. At the age of 18, he began studying at the Fukuda Hachinosuke School in Tenjin Shin'yo-ryu Jujutsu. Tenjin Shin'yo-ryu is a soft martial art that emphasizes more harmony than fighting, but at the same time includes striking techniques and throwing techniques. In 1882 is when he created the Kodokan Judo.

Muso Gonnosuke Katsuyoshi, samurai of the early 17th century, launches a system that elevates the simple stick to one of Japan's favorite martial arts weapons called Jojutsu. He practiced in Tenshin Shoden Katori Shinto-ryu, then studied Kashima Jikishinkage-ryu, practicing their secret techniques called "ichi no tachi". According to legends, Gonnosuke took part in a large number of duels, winning them all until he met Miyamoto Musashi. If we can believe the legends, and there are more legends than real facts about these two masters - Muso Gonnosuke is the only person who had defeated Miyamoto Musashi in a duel. 

The first of the two legendary duels between Musashi and Gonnosuke took place in the beginning of 17th century. Gonnosuke had one day encountered Musashi and had challenged him to a duel. Musashi accepted and Gonnosuke, taking out his sword, immediately charged Musashi who with ease avoided Gonnosuke's strike and locked Gonnosuke's sword, using both his long and short sword. The loss made Gonnosuke take a path of exile at a shrine in Mount Hōman where he perfected his swordsmanship and developed Jojutsu. Gonnosuke defeated Musashi through the use of the jo's surperior length by keeping Musashi's swords out of range.