Secret is Hamasaki Ayumi's eighth album. It debuted at the top spot of the Oricon weekly chart with first week sales of 386,280 copies. Track #5 "It was" was originally produced for her previous album (miss)understood but for some unknown reason it wasn't included on it.
Secret is believed to be Hamasaki's most successful album yet in worldwide sales. Not only did Secret top the Japanese charts, the album was an instant number-1 hit in countries as Taiwan, Singapore, Hong Kong and China surpassing the (miss)understood international success, being in Taiwan the #2 Japanese album of the year with a 3.54% of total sales.