Won as Aomori, just after you get all abilities and troops, grind giants (keep 1 area alive) and put them on Hokkaido, Ishikawa and Nagasaki. Ability speed on them and you win!
Not a hard game, In the main website (ninjakiwi) i am level 23/17 and so this is a very boring game but there is much, much more on ninjakiwi such as cosmetics and more cities so with that being said, you should play this on ninja kiwi
 "The Great War of Prefectures"){kind=icon}
 "Strikeforce Kitty 2"){kind=icon}
 "Love-o-Meter"){kind=icon}
 "Bloons Monkey City"){kind=icon}
 "A Dance of Fire and Ice"){kind=icon}
 "Bit Battles"){kind=icon}