Age of Samurai: Battle for Japan

I don't know anything about this subject so I can't speak to the veracity of the information. However, it is overall quite engaging and the mix of dramatized scenes, information from their experts, and narration is good. However, I feel like there could have been better diversity in their "experts". I find it odd that they're essentially all British or American. I can't believe that they weren't able to find more Japanese subject-matter-experts to interview. That strikes me as a real issue with their production decisions.