黑山羊
Echo, 华云龙KLE
Echo（必有回响）
Shmily
ECHO
GUMI, CircusP, Crusher-P
ECHO
Crusher-P, GUMI
Vivy (feat. echi)
Miraie, Echi
ECHO（五人唱见双声道/ShakingHigh Remix）
ShakingHigh
ECHO (歌ってみた)
Reol, 茶理理
falling for you (feat. sumther, Alys, chougaki & stephanie)
Echi, sumther, Alys, chougaki, Stephanie
echo
driftcat, Moon Jelly
ECHO
+α/あるふぁきゅん。
echo (acoustic)
Alexander Stewart
Echo
THE BOYZ
Desire (feat. kid sora & kinji)
Echi, Kid sora, Kinji
Lovers Again (feat. sumther & wenszy)
Echi, sumther, wenszy
Melatonin (feat. kinji)
Echi, Kinji
permission. (feat. miraie)
Echi, Miraie
Echi
Ogene
Echi
Priska
Echi (I) (feat. Gianluca Pischedda)
Stefano Guzzetti, Gianluca Pischedda
Echi (II) (feat. Gianluca Pischedda)
Stefano Guzzetti, Gianluca Pischedda
Echi
AMarti
Echi-tinna
Echi
Echi (with Andrey Manchev, Grigory Deratsuev, Vitaly Perov & Aram Rustamyants)
Renzo Ruggieri, Andrey Manchev, Grigory Deratsuev, Vitaly Perov, Aram Rustamyants
Echi
Kethata, Black Ace
Echi
Lupi Gladius
Echi
I Giganti Della Montagna
Echi
Heads or Tails
Echi
Priska
Echi
Olaf Polziehn, Jochen Feucht
Echi
Otigba Agulu