Interesting. I thought Hattori Hanzo was just a character in the Kill Bill movies. It's nice to learn new things, and I like the wider view.
A lot of people seem to, but the name is used in popular fiction a lot. The "real" Hanzo was a retainer for Ieyasu Tokugawa in Feudal Japan, during the Unification of the islands. He served as a samurai and commander, but is most notably remembered for the rumors surrounding his status as a ninja master, leading a clan of those spies from his home of Iga. Hence why there are tons of fictional ninjas who just happen to be called Hanzo in everything from movies, to manga/anime, to video games. The one here just happens to be Tecmo Koei's interpretation, which is suitably over-the-top.
7 - I preferred your previous one, even though it would normally be the other way around if I look at past tastes... I don't know why.