Launch Demon Slayer RPG 2 in Roblox. Press the / key and open the chat box. Type the code into the text field (exactly like they are on our list). Press Enter and claim your rewards.

Here are all the working Onikami codes as of 17th August 2025: Not sure how to redeem codes in Onikami? Here’s what you’ll need to do: Click the ‘MENU’ button near the top left corner of your screen.