1)Too many port city is very hard to Defend.
2)Focus on navy from the begin means expansion on land goes slow for 1st few days
3) Naval war depends on Hit n Run/ Trick shot. you sleep and you are dead.
4)Distance from other nation makes Japan more slow to reinforce the battlefield means again slow Expansion.
Moral of the story: It's not easy to balance the Expansion and Economy when aiming for a standing big navy.
But now there are 2 more new island near japan ( this might help a bit)
2)Focus on navy from the begin means expansion on land goes slow for 1st few days
3) Naval war depends on Hit n Run/ Trick shot. you sleep and you are dead.
4)Distance from other nation makes Japan more slow to reinforce the battlefield means again slow Expansion.
Moral of the story: It's not easy to balance the Expansion and Economy when aiming for a standing big navy.
But now there are 2 more new island near japan ( this might help a bit)
Have fun, nothing personal.