Yamamoto is a powerful Soul Reaper and some would say that he is the strongest Captain. His fire abilities are lethal and one good hit can melt many opponents. I doubt that his flames would be able to pierce Bass’ barrier and one significant disadvantage for Yamamoto is his lack of speed compared to Bass. Yamamoto is actually very fast, but he’s just not as fast as the mighty Bass. Bass’ power is also nearly limitless and a good Earthbreaker should weaken Yamamoto enough for future attacks to end things. Bass wins.