According to Nankibunko's "Kajikawa Nikki" (Kajikawa's Diary) owned by General Library, The University of Tokyo, there is no record of Asano shouting 'do you know what this revenge is for?' at the moment of the incident, and it says that he, all of a sudden, slashed at Kira while screaming.
東京大学総合図書館蔵、南葵文庫の『梶川日記』によれば、刃傷のときに浅野が「この間の遺恨覚えたか」などと叫んだ事実はなく、ただわめきながらいきなり斬り付けたとなっている。