Let Me Know is a song by Japaneseelectronic musician Towa Tei, featuring singer Chara on vocals. It was released as the fourth single from his album Last Century Modern on June 23, 1999 (1999-06-23), a month before the album's release. It debuted at #34 on the Japanese Oricon album charts, and charted for four weeks. It did substantially better on the J-Wave airplay charts, charting in the top 30 for eight weeks.
Tei had produced Chara's songs Shimashima no Bambi(しましまのバンビ,Striped Bambi) (from her 1997 album Junior Sweet) and Atashi wa Koko yo(あたしはここよ,I'm Here) (from her 1999 album Strange Fruits, released three months before this single).
The song also appears on the 1999 remix album Lost Control Mix with the remix Let Me Know (Mighty Bop Remix) (remixed by Bob Sinclar), as well as the original version appearing on Tei's 2001 best-of album, Towa Tei Best.