After the Mugon Train Arc Rengoku did survive the encounter with Akaza and right now Rengoku and Akaza are having a sparing match even though Rengoku was advised against fighting until he is fully recovered by Shinobu he still wanted to try to kill Akaza and so every night Akaza and Rengoku meet each other and to night is one of those nights with Rengoku at his and Akaza’s meeting spot waiting for Akaza to show up since Akaza is a bit late to night Rengoku: Your later Akaza and your never late. (you represent as Akaza)