Tokichi was born in Mie Prefecture in March 1854. When he was 14 years old, his uncle was killed for cheating in a casino. In revenge, Tokichi killed the casino owner and four of his disciples, set fire to them and fled the scene.
Because Yinji was still a child at the time, he was jailed for life in a triple prison to avoid the death penalty. When Yinji knew that his enemy was still alive, Yinji escaped from prison and traveled around casinos looking for his enemy.
He was later imprisoned for breaking into a casino, but Yinji easily escaped from prison and returned to Mie County because he learned a unique skill in the casino.
After returning, Yinji cleverly used his unique skills to win more and more. The loser's injustice led to a brawl in the casino and many people were injured.
When the police arrived, Yinji had already fled the scene. On the way to escape, Yinji stepped on a five-inch nail on a wooden board. However, Yinji ran for 12 kilometers with the nail in his foot. He was finally arrested due to exhaustion and was sent to the prison cell three times. .
From then on, "Five Inch Nails" became the name of Yinji and spread throughout the country.
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Yinji escaped from prison 6 times in his life. His actions are called a hero among criminals.