I have a song which I need help identifying the words to. This is the song: https://www.youtube.com/watch?v=8o1BUubUhAY
At the start the word which he repeats that sounds like 'batsu(?)'.
At 4:19 and 4:47 the word which he shouts that sounds like 'kutose(?)'.
What are these words which he is saying?