"Secret Code" is a mid-tempo ballad that showcases the duo's signature vocal harmonies, bolstered by a driving beat and tasteful string arrangements. The single marked their 26th consecutive chart-topper.
- "Secret Code" was released on ELOV-Label, a division of Storm Labels Inc., on August 27, 2008.
- The single reached number one on the Oricon Weekly Singles Chart in its first week of release.
- "Secret Code" was used as the theme song for the drama "33pun Dake Ai shitemasu" (33 Minutes of Love).
KinKi Kids are a Japanese pop duo consisting of Kōichi Dōmoto and Tsuyoshi Domoto. They are one of the best-selling groups in Japanese history and have been active since 1997. In August 2008, KinKi Kids were at a high point in their career, having recently concluded their annual dome tour and preparing for the release of their tenth studio album, "f".
Tracklist
