Every Karate-Ka studying Shotokan here under the KUGB are tought Kihon as the very first kata, a basic kata of 2 "basic" moves - gedan-bari and oi-zuki.
The way this has been taught (in my experience) is as a turn to left, lower block against kick then follow up with a punch to the chest, turn block kick from behind, follow up with punch to chest etc etc blah blah blah. Yes that is a very basic description of what the techniques could be used for, however this very much depends on peopel attacking you, one from the left then one from behind while your back is turned. In my experience, this just doesn't happen.
This video I found on youtube is a far more accurate description of the techniques used in Kihon (remember, the most "basic" of kata). Used against a single opponent the opening moves make far more sense in the modern world don't they?