Title character of [i][[Osomatsu-kun]][/i] and its spin-offs.

He is the eldest brother in a group of [[sextuplets]]. Despite being their leader, he often is very unreliable and bull-headed.

Though indistinguishable from his brothers in [i]Osomatsu-kun[/i], in [i][[Osomatsu-san]][/i] he is associated with the color red and a distinctive [[grin]] on his face.
松野おそ松 おそ松