Thanks Jorvik and Mike for the input.
Sun Salutation is a flowing sequence of 12 basic yoga postures which is widely used as a warmup.
We used to have a Godan who taught an open rank class on Saturdays. He often incorporated the Sun Salutation into the class as a cool down. At the time I thought is was just an exercise sequence and didn't realized that it was a widely known and used Yoga exercise.
Also, several of the junan tiso stretches we normally used in class are also legitimate yoga asanas, the hurdle stretch being one of them.
In addition to Sun Salutation, many karateka might be familiar with The Five Tibetan Rites, which are five basic yoga postures that make an excellent warm-up sequence for class or could easily be incorporated into the class plan for stretching.
I am noticing a number of subtle similarites to karate in several postures. The Mountain includes our Sanchin shoulders back and down position as well as the butt tuck and pelvic forward thrust. In the Hurdle Stretch there's the dynamic tension of the front leg foot pushing back and the back foot pushing forward for strength and stability.
I find The Eagle a challenge. And some of the advanced stretches like the Shoulder Stand and Plow I do easily and I have always been able to do full front and rear stretches. One of the women in the class asked me how many years I've been doing yoga
I blew her away when I told her it was my fourth lesson.
I find the workout sessions to be vigorous, challenging and satisfying. I have balance issues to imporve upon and I'll benefit by the upper body and shoulder stretches as in The Eagle..
I think the Yoga will be a definite benefit to my kata execution, balance and exercise symmetry and general physical health (it works the internal organs as well as the muscles, ligaments and tendons.)