J'ai vu ça sur APforums, pour expliquer le nom de l'attaque de Zoro :
"It's a concept in Nichiren Buddhism. According to Nichiren Buddhism, the world we live in is centered around a mountain, surrounded by 7 mountains and 8 seas, and the whole thing is surrounded by another mountain range, making it 9 mountains and 8 seas in total.
Within the seas are 4 continents. All of this make up one world. 1000 of these make up one minor thousand world. 1000 minor thousands make up a intermediate thousand world. 1000 intermediate thousands make up a big thousand world.
Hence, a big thousand (daisen) is made up of 3000 worlds (sort of...more like 1000 to the power of 3). "
J'ai trouvé ça intéressant donc je le poste au cas où vous ne l'auriez pas vu.