Knowing nothing about the anime besides the name, I'm going to take a wild guess that it is roughly based off the movie "Seven Samurai"? I never saw that movie either, but I did see "The Magnificent Seven," a Western based off the same idea (cowboys instead of samurai), which is regarded as one of the greatest Westerns of all time.
Kinda makes me want to check out the original movie, and then maybe the anime :)
Retired News Writer for the ZAM Network
WoW - Aureliano the Insane - level 90 Druid on Sen'Jin
Nanaoki - level 90 Mage on Sen'Jin