If Mitsuyo Maeda had not visited Brazil, MMA may not exist. If it did, it would be very different.
"A
 Lion's Dream (Conde Koma)" is the biography of Maeda. Written by Norio 
Kouyama, this book was honored with the Shogakukan Non-Fiction Award. 
Kouyama is not a martial arts specialist, so in this review of the book I
 evaluate how much merit it has as a biography.
Jigoro
 Kano was ambitious about education. He had dedicated himself to 
developing judo in Japan, but at the same time he was known as an 
educator. During this time, Japan was not valued as an equal by the 
western world, and martial arts were regarded lightly because of western
 culture and its guns. Martial arts were treated as strange samurai 
tactics that were not useful (against guns) during the Meiji period in 
Japan.
Kano
 believed that education could change the perspective about martial arts
 and of Japan itself. Therefore, he believed that he needed to expand 
traditional martial arts by introducing them to the western world. He 
dispatched many of his students around the world. Tsunejiro Tomita was 
set to be dispatched, but he was already more than 40 years old and Kano
 felt that he needed to recruit more of the younger active martial 
artists for this task. Luckily for Maeda, his other mentors were sent to
 Butokukai and he was able to travel abroad.
Butokukai Head Quarter 
Before two judokas began the trip, one was recognized in America. That man was Yoshitsugu Yamashita, who impressed Theodore Roosevelt with his judo. Roosevelt wanted to bring a judo class to Annapolis, but Annapolis did not like that idea. After further discussion, Yamashita was permitted to compete at Annapolis. He fought a wrestler, Lieutenant Joseph Grant, who was roughly 10 years younger than Yamashita. Grant stood 2.0 meters tall and weighed 160kgs. Yamashita was 1.6 meters tall and weighed only 68kgs.
Yamashita
 had already spent one year in the United States and he knew how 
wrestlers fought. He countered Grant's forward movement with a throw and
 immediately went for a rear-naked choke. Grant stood up to try to flip 
Yamashita, but Yamashita secured an armbar when Grant used his left arm 
to stand. Grant gave up the fight and that made Yamashita the new judo 
coach at Annapolis.
Tomita
 and Maeda arrived in New York and were invited to West Point due to 
Yamashita's success at Annapolis. Maeda fought a school wrestling 
champion who took top position early in the match. The audience believed
 that that was the definition of victory, but Maeda rose to his feet and
 threw the wrestler before submitting him with an armbar. The audience 
still believed that the wrestler had won by pinfall.
Even
 at his advanced age, the audience believed that Tomita was better than 
Maeda since he was Maeda's mentor. As an athlete, Tomita was past his 
prime, but West Point arranged for him to compete against an even better
 fighter than Maeda had faced.
Tomita
 lost that fight and that made his and Maeda's evaluations lower. This 
is why Maeda went on to challenge many other martial arts fighters for 
money and recognition. He made trips to many countries to challenge 
other martial artists, and he understood judo's merits and faults 
against various disciplines.
During
 his breakdown of wrestling, Maeda noted that he would only accept 
fights against clothed opponents. He felt that he would still defeat 
unclothed wrestlers who were the same size as him, but he could lose to 
heavier opponents simply due to a power disadvantage. He recommended the
 Tsurikomigoshi technique against wrestlers because catching an arm 
would benefit the judoka and also defend against an opponent's attacks 
if a throw failed.
Maeda
 broke down tactics for competing against a boxer as well. He tried to 
challenge Jack Johnson, but Johnson refused to take part in a cross 
martial arts battle. The author of "Conde Koma" points out that this was
 similar to how proud Helio Gracie was when Joe Louis refused his 
challenge.
Maeda's
 foes were not billed as the strongest martial artists. Each one would 
simply be presented to him as a boxing champion or a wrestling champion.
 Maeda was confident that he could beat all of them, but there was a 
level of respect from both sides and his opponents did not proclaim to 
be "masters" at boxing or wrestling.
Maeda
 gained fame among Japanese immigrants in the United States due to the 
martial arts contests that he won. At the time, a movement had begun in 
America against Japanese immigrants. Maeda was conscious of the respect 
from immigrants and also of the social circumstances. He used the ring 
name "Yamato Maeda" to encourage people and himself.
During
 his trips all over world, Maeda spent time in some countries where 
Japanese people had comfortable lives. Brazil was undeveloped compared 
to America, but Maeda felt that there were still opportunities for 
Japanese immigrants to thrive.
Yoshizo Machida, who manages Maeda's grave, shows a copy of "Conde Koma."
My other artcile about Judo's advance to the world
Big thanks to Robert Sargent (MMA Rising) for English editing.