In "One Piece", it is well known that the Four Emperors are the emperors of the second half of the Great Passage. The four Pirate Emperors are stronger than the New World, and each of them is a rare party giant, with a variety of brilliant and unmatched powerful records, which can be called the strongest existence.

The Four Emperors Whitebeard is the strongest man in the world, Charlotte Lingling is the strongest woman, the red-haired Shanks has the strongest overlord color domineering, and the Hundred Beasts Kaido is known as the strongest creature in the world. As one of the four emperors, this Kaido has the most brilliant record, 7 defeats, 18 arrests and imprisonment, thousands of tortures, and 40 death sentences.
However, Kaido was not dead, even if he was sentenced to capital punishment, kaido could not help kaido, if he was hanged, he would break the chain of hanging, and the guillotine could crush the guillotine, even the spear stabbing could not break through his defenses. All in all, no one can kill Kaido. This is also the reason why Kaido frequently commits suicide and does not end up. Since you can't die, you can't be afraid of how you die.
However, even if he is as strong as Kaido, he also has a tragic experience of 7 defeats and 18 arrests and imprisonment. The first defeat and imprisonment has been revealed, that is, in the memoirs about embers mentioned in 1035 words. Both Kaido and Ember are imprisoned at punk Hassard's institute, and both become guinea pigs at the institute.
Kaido's strength was strong enough to break the chain on his hand and escape. He fled, but he was very wavey, destroying the institute, and wandering leisurely, without the feeling of being a prisoner, and even found another guinea pig ember, rescued the ember to start forming his pirate regiment. This was Kaido's first defeat since his solo debut, his first arrest and imprisonment, and his first escape from prison.
This is the picture of Kaido when he first started forming the Pirate Regiment, almost everything is the first time, and who can defeat Kaido and arrest him and imprison him? This involves the Locks Pirate Regiment, 40 years ago, the Navy elite out, Cap and One Piece Roger sniped At Locks, annihilating the Locks Pirates in one fell swoop.
The whole Locks Pirate Regiment fell apart, fleeing, dead, wounded, imprisoned, combined with Kaido's youth image, he was defeated by the Navy at that time and imprisoned. The first time he was defeated and imprisoned, he escaped from prison for the first time, but the Locks Pirates were gone, and he began to form his own pirate regiment. So, at Punk Hassard's Institute, Kaido was imprisoned for the first time, escaping to heaven and thus starting his career as a pirate who had repeatedly died, casting the title of the strongest creature.