In one of the preview pics for ep 11 he's seen in a nice suit with his samurai sword sitting comfortably on his waist.....
now 400 years of training
+ wisdom
+ invincible
+ knowledge
Think About it...
Nuke Him, Burn Him, Freeze Him, Break Him, Cut Him In 2...
He'll Still stand up and chop you up even if it takes 100 more years
Outlives you, he wins...
No one can beat him
Locking him up is the only weakness

, but it doesnt mean he loses, that planned has failed once.