Saddest Japanese Christian hymn ever

I have kept this Japanese Christian hymn in my Youtube account under Playlist and I played it very often when I need that little bit of faith to push me on.

Sometimes, we forget our purpose in life. We get too comfortable. We forget God. So, I always make it a point to turn to some music, Bible and things that can touch a chord in me to remind me I am still alive and I am here to do God's will.