Krush 40 was a kickboxing event held on April 15, 2014 at Korakuen Hall in Tokyo, Japan. The double main event featured a Krush -70kg title match between Yasuhiro Kido and Hiroki Nakajima and a bout for the vacant Krush -67kg title between Yuya Yamamoto and Keita Makihira. The card also included super fights for Masahiro Yamamoto against Yannis El Hajaoui and Shintaro Matsukura against Onder Ural.