Deep River (stylized as DEEP RIVER) is the third Japanese studio album (fourth overall) released by American-born Japanese J-pop star Hikaru Utada, released in June 19, 2002. It sold just over 2.35 million copies in its first week of release (much like the 2,026,870 units by First Love and 3,002,720 by Distance in their debut sales week), easily debuting at #1 on the weekly, monthly and eventually yearly charts of the Oricon Albums chart. Deep River is Japan's 5th highest album in debut sales.

The final track, "Hikari", would be her first single to reach #1 on the Oricon Weekly Singles chart three times, and would be the Japanese version of the theme song for Square Enix's smash hit RPG video game, Kingdom Hearts. The song has an English version, "Simple and Clean," that would accompany promotion of "Kingdom Hearts" in the Western Hemisphere and elsewhere. That song would give Utada's voice and music its first major mark of international recognition. The album was Utada's most acclaimed work to date by fans and critics alike, and earned her the Triple Crown at the 17th Golden Disc Awards. DEEP RIVER is the 8th highest selling album in Japan of all time.

According to IFPI the album is listed at #18 on the Top 50 Global Best Selling Albums for 2002