The Japanese think that these ages are very important.At the age of seven ,a girl wears an obi for the first time.The obi is a piece of cloth which is worn round the waist over the kimono.At the age of five ,a boy wears his first hakama pants in public. Hakamas were worn by samurai in the past.The age of three is special in Japanese culture because it is the time when children are allowed to let their hair grow.