Oyaji no Hanamichi (おやじの花道), roughly meaning "Old Man's Runway", is an enka (traditional-style Japanese ballad) song that first appeared in GO-GO Tamagotchi!. It always plays on a stereo in Oyajitchi's stall and he often sings along to it.
A full version of the song sung by Oyajitchi appears on the Ready GO Hasha GO Daishu GO! Tamagotchi! CD.