Too niche eh?
15 Hint: This is the 8th game in the series that originated in 1985, the newest entry is coming out next year in 2016.
Hint 2: The series is kind of a spin off from another series that first came out in 1983. The latest game in that franchise came out this year in NA.
Hint 3: Like many games in my list this game came from Koei.
Hint 4: 2nd game in the series to feature officer mode.