is a Japanese
mixed martial artist competing currently for
Rizin Fighting Federation,
grappler, and former police trainee currently competing in
ONE Championship's lightweight division. He is noted for being the DREAM Lightweight Champion,
ONE Lightweight Champion, former WAMMA Lightweight Champion and former Shooto Welterweight Champion. Aoki holds a
black belt in
Brazilian jiu-jitsu under
Yuki Nakai, as well as a black belt in
judo. As of 2008, Aoki, along with
DEEP champion
Masakazu Imanari, and
Sengoku champion
Satoru Kitaoka have founded the "Nippon Top Team" as a group of elite Japanese grapplers competing in MMA. As well as his MMA credentials, Aoki has garnered several submission grappling accolades including two All Japan Jiu-Jitsu championships, a Japan Open Jiu-Jitsu championship, a Budo Open championship, and an
ADCC Japan Championship.