Well... That sounds just like a worship. I saw a lot of contradictions and confusions on it, but sounds real, like it came from Yakushimaru Etsuko heart. It's great, a really great song. God is love, and I know Him, and I can tell: He loves you, and invite you to a great party in heaven! All you have to do is accept or deny, don't worry about what to dress and what to get in your journey; He is calling you to enter in that train, to know Him face-to-face (not dying, but in life). I loved the song!
wow that "rising voice" at 4:03 made me fell like getting lifted up to the stars and then the one carring me would let me go that i could start flying myself :D I don't even understand a word but thats kind of how it made me feel ¯\_(ツ)_/¯