


Because of this, the calm belts are very effective barriers for those trying to enter the Grand Line. Surrounding the Grand Line are two regions called Calm Belts ( 凪の帯 ( カームベルト ), kāmu beruto), similar to, which experience almost no wind or ocean currents and are the breeding ground for huge sea creatures called sea kings ( 海王類, kaiōrui, lit. The Grand Line ( 偉大なる航路 ( グランドライン ), Gurando Rain), a sea that runs perpendicular to the Red Line, further divides them into four seas: North Blue ( 北の海 ( ノースブルー ), Nōsu Burū), East Blue ( 東の海 ( イーストブルー ), Īsuto Burū), West Blue ( 西の海 ( ウェストブルー ), Uesuto Burū) and South Blue ( 南の海 ( サウスブルー ), Sausu Burū).
