・Ko Matsushita Official Site

・Koyukai　

・Gaia Philharmonic Choir

・Collegium Cantorum YOKOHAMA

・Brilliant Harmony

・Tokyo Ladies' Consort ”SAYAKA”

・L’Ensemble Tokyoïte “Les Pléiades”

・Avis Libera

・Ensemble Giione

・Intercollege Ladies' Choir Voces Fidelis

・Intercollege Male Choir Voces Veritas

・Karuizawa International Choral Festival

・Utaibito Gombe

・Minamino Kids Singers

・Tokyo-to Choral Federation

・Pana Musica

・Brain Online shop

・Giovanni Records Website