学生 がくせい横綱 よこずなだったら
gakuseiyo kozunadattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 学生横綱

1. If/When [one] was a student sumo champion:; If/When [I/he/she/it] were a student sumo champion:

Tara Conditional
Sumo