Masahiko Kimura is widely considered one of the greatest judoka of all time. In submission grappling, the reverse ude-garami arm lock is often called the "Kimura", due the fact it was the concluding technique in his fight with Gracie Jiu-Jitsu founder Helio Gracie.
Kimura also studied karate under Gichin Funakoshi for a couple of years, but eventually switched to training Goju-Ryu Karate under So-Nei Chu (a pupil of Goju-ryu founder Chojun Miyagi) and finally became an assistant instructor, along with Gogen Yamaguchi and Masutatsu Oyama, in his dojo. Interestingly, Kimura attributes the use of the makiwara as taught to him by So-Neichu and his friend and training partner Masutatsu Oyama (founder of Kyokushinkai), as being a significant contributor to his competitive judo success due to its strengthening effect on his hands.
You can find more about Masahiko Kimura on this webpage (including his description of his bout with Helio Gracie): http://en.wikipedia.org/wiki/Masahiko_Kimura
Here is a video of Masahiko Kimura teaching some of his favourite judo techniques, which I’m sure you will all find interesting.
All the best,