That’s pure badassery.
The first song is an excerpt of a Japanese karate song (incorrectly labeled as “Machida Family War Song“). Yoshizo Machida (Lyoto’s father) used to sing this song to him when he was a kid, before karate competitions. His manager had Yoshizo recording the song, so it could be used along with his walkout song. That’s the result.
TSUKI TO KERI TO WA KARATE NO WAZA YO
MYO WA KYOJITSU NO KAN NI ARI
GOJO NO OSHIE WA MICHI HITOSUJI NI
HAGE MU ONOKO NO KOKORO IKI
Osu. Osu. Osu.