Mega Max Bump 2023 in Yokohama was a professional wrestling event promoted by CyberFight's DDT Pro-Wrestling (DDT). It took place on May 3, 2023, in Yokohama, at the Yokohama Budokan.

The DDT Extreme Championship is a singles title in the Japanese professional wrestling promotion DDT Pro-Wrestling. The title was established in 2006 and it is mostly defended in stipulation matches, with the defending champion being given the right to choose the stipulation. The title has also been defended at events held by Union Pro Wrestling, one of DDT's former sub-brands.