Four hundred years ago, the Imperial court of Japan didn't have much power and there were many warlords everywhere in Japan. They fought each other in order to keep their opponents under their control.
Oda Nobunaga beat most of his opponents and almost succeeded in keeping his all opponents under his control, but he was assassinated by his subordinate just before his final victory.
Toyotomi Hideyoshi was a distinguished subordinate of Oda, he fought against and beat Oda's subordinate who assassinated Oda. Then he brought the whole country under his rule.
After Toyotomi Hideyoshi died, Tokugawa Ieyasu, who was also a distinguished subordinate of Oda, beat Toyotomi's family and subordinates and opened the Edo Bakufu. Bakufu is the Japanese government headed by a shogun.
Oda Nobunaga was cruel and sharp, and looked down on people clinging to vested interests. He was definitely a reformer. Toyotomi Hideyoshi was a social and sympathetic person, so he was good at making allies. Also, he was a man of action and good at fighting. Tokugawa Ieyasu was a cautious and perseverant person. He was good at stratagems.
There are three short phrases that describe their characters,
Oda Nobunaga would say this, "Oh little cuckoo, if you don't sing for me, I will order someone to kill you."
Toyotomi Hideyoshi would say this, "Oh little cuckoo, if you don't sing for me, I will make you sing."
Tokugawa Ieyasu would say this, "Oh little cuckoo, If you don't sing for me, I will wait for you to sing."
Which character do you like most?