First let me say i am a fan of Yasuaki Kurata. I am not a fan of this TV series by him. I disappointed of the fight scenes, sound effects in the fights and the silly undercranking they sometimes use in the fight scenes. You also get the same song each time a fight scenes occurs. You get tired of it after a couple episodes.
This stories are also very repetitive in my opinion. I mean in story wise. This series won't wind any awards for stories, acting and fight choreography. I think the fights which have like 3-5 fights in each episode, looks not good. I think the choreography looks too simple most of the time.
You can see in nearly every fight that Kurata doesn't connect the punches and kicks to the villains. Didn't they have monitors back in the 70's? Maybe not, but they clearly had dailies to watch so they should have re-shot figths that you could clearly see that Kurata didn't really hit that person, just the air. I won't watch this again. This series is not recommended by me unless you like simple choreography and disappointing fight scenes.