lol.
Technically yes. But the reality is Ousen barely edged out a win against Riboku at Gyou. You could argue that if Riboku’s own state hadn’t rung the bell, Riboku may have won. But yes Ousen technically did inch out a win.
At Hango, Riboku utterly curb stomped Ousen. Shibashou annihilated Ousen’s central army and killed all of his commanders, and in the end Ousen literally lost 120k men in a single day of battle thanks to Shibashou and Futei, actually lol.
Ousen inched out a win at Gyou.
Hango Riboku (Shibashou) folded Ousen like a lawn chair, killed all his commanders and exterminated his entire army, folded Ousen up into a paper boat and sent him floating down the river lmfao.