@UmekiABSOLUTE thats not correct. Sambo and BJJ guys do the majority of leglocks, however they are still practiced in kata form in kodokan judo although i'm unsure of what the kosen guys do
@JudoNoSeito : the way this actually works at full speed is the foot and the off balance occur at the same time. however i agree that any good opponent will counter you on any throw where you leave a little wiggle room
for example: inoue countering at 2001 all japan championships
from the depths of dreams was an EP if i remember correctly