falling for you (feat. sumther, Alys, chougaki & stephanie)
Echi, sumther, Alys, chougaki, Stephanie
Desire (feat. kid sora & kinji)
Echi, Kid sora, Kinji
ECHO
Crusher-P, GUMI
ECHO
GUMI, CircusP, Crusher-P
Vivy (feat. echi)
Miraie, Echi
Echo（必有回响）
Shmily
Lovers Again (feat. sumther & wenszy)
Echi, sumther, wenszy
echo (acoustic)
Alexander Stewart
Echo
THE BOYZ
ECHO
+α/あるふぁきゅん。
Melatonin (feat. kinji)
Echi, Kinji
permission. (feat. miraie)
Echi, Miraie
echo
driftcat, Moon Jelly
黑山羊
Echo, 华云龙KLE
Echo
ECHO
Echi
Ogene
Echi
Priska
ECHO (歌ってみた)
Reol, 茶理理
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