I don't think I am history person but I think I should try one or two Asian ones to test myself. So thank you…
Taiga can be loosely translated as "Big River" or "Great River", it refers to time, the big flowing of time as we watch it through a very big river. It's a metaphor decribes the time passing by. Not every period Japanese drama a taiga. Period dramas are called "jidaigeki"
!!SPOILERS AHEAD!!
Bad Guy and Shark villains were so evil but they still got the chance to laugh at the end. That ticked me off big time!