The Cursed Sword Master's Harem Life: By the Sword, for the Sword Vol. 1 (manga)

Just an ordinary high school student, Fujinomiya Sojiro's life was cut short when he was stabbed by a burglar one fateful night. Or so he thought. Revived by a mysterious deity, Sojiro finds himself transported to another world, armed with a legendary samurai sword, “Hotomaru,” plus the very blade that ended his life. What's more, Sojiro discovers that these enchanted blades can transform into beautiful babes!