NOTE: The OST album for the Studio Ghibli film "Ocean Waves" ("海がきこえる" or "Umiga Kikoeru") contains TWO related tracks. Track 02, "Umiga Kikoeru," is instrumental in the key of G-Bb-G (approx. 6 min.). Track 10, "Umini Naretara" (ending theme), is vocal in the key of D (approx. 4.5 min.). Both of these pieces are composed by Shigeru Nagata and develop around the same theme in different ways. 

This product also containts part scores for Voice (or a C instrument, e.g., Flute/Oboe) with Ensemble (including part scores)

The arrangement corresponds to the full length of the OST Track 10 (about 4.5 min.).

Note: in the YouTube video, the vocal part is played using the flute sound.