Brazilian Blowout is better in most cases. The Japanese method can be seriously damaging to hair because it breaks the bonds that hold the strands together. This causes the hair to become dry, brittle, and weak. In turn, your hair becomes unhealthy, causing it to break off at the scalp or split into several hair strands. Many people have switched from Japanese straightening to Brazilian blowout because it is safer for you and makes your hair more beautiful.