U-ka saegusa IN db (三枝夕夏 IN db, db being spelled decibel, さえぐさ ゆうか イン デシベル) was a Japanese rock band comprised of U-ka Saegusa (vocals), Yuichiro Iwai (guitar), Taku Oyabu (bass), and Keisuke Kurumatani (drums). They were signed under the GIZA studio label. They debuted in June 2002 with their first single "Whenever I think of you". 2003 saw the release of their 6th single "君と約束した優しいあの場所まで", which became a smash hit and their first first Top 10 single in the Japanese charts, peaking at nº6 in the Oricon weekly charts.

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