Samurai Musou ~Sengoku Saikyou no Samurai, Isekai o Seiku~

Rokurou, the strongest samurai of the Sengoku period, is suddenly summoned to another world in the middle of battle. His sole purpose is to take the heads of the strongest warriors. He doesn't care about titles — whether noble, lord, or king — if they don't align with his beliefs, he declares, "It's a fight. It's revolution. It's conquest!" and continues his way without hesitation.