The Tomoe Nage is an extremely powerful throw in Judo and is extremely applicable for Brazilian Jiu Jitsu. The Tomoe Nage has many benefits. If the throw does not work out, you are technically just pulling guard. In bjj, you can look at the Tomoe Nage as a guard pull that leads directly to a sweep. Many high level bjj practitioners utilize various forms of the Tomoe Nage from closed guard, De La Riva, and more. Tomoe Nage is basically an over head sweep. Check out this quick clip of a Yoko Tomoe Nage from standing below.