The secret is due to Japanese likes to consume Natto.Natto contains lots of nutrition substances;such as Vitamin B, Vitamin K, Saponin, Isoflavone, Amino Acid, Linoleic Acid.

• 由于日本人喜爱吃纳豆，而纳豆含有许多对人体有益的生物物体，如：维生素B群，维生素K，皂角苷，异黄铜，氨基酸及亚油酸。