Climb to the top in the Sekai 2.0. Sekai means "World" in Japanese. This best selling BJJ gi from FUJI Sports was completely redesigned for the high-performance athlete in all of us. Excel to greatness with gear that will never fail you, even during the most rigorous training sessions and competitions. Sekai 2.0 - World Ranking. Made of a combination of mesh and fabric, with fully embroidered Sekai 2.0 logo and the FUJI mountain and sun on the back. One Size, with snapback for an adjustable fit.