Ayako Hamada
Nagashima's first major match since becoming a freelancer took place on September 23, 2015, when she unsuccessfully challenged Ayako Hamada for Pro Wrestling Wave's Single Championship. On September 19, 2016, Nagashima and Megumi Yabushita, representing the Crysis stable, defeated Keiko Aono and Kyoko Inoue to win World Woman Pro-Wrestling Diana's vacant World Tag Team Championship.