Though Matsu got knocked out by sumo wrestler Iwanokuni, he won’t take it lying down.  He rushes to the public arena where the sumo troupe is entertaining the crowd, barges onto the ring, and challenges Iwanokuni to a fight.  Headmasters of sumo stables take notice of Matsu’s strength ...
nor any experience in matters of the world.
Und er ist noch so unerfahren.
ni experiencia en el mundo.
ni experiencia en el mundo.
Não sabe como se portar 
em situações assim.