idk how this works, but I feel like you should mention that devs don't support people playing on mobile devices. The main reason being that they require people to cache files so that they don't waste too much bandwidth. If your cache settings aren't properly configured you might be banned.
That app is not FREE. I know how to do it free.
Simply download this app - puffin
Puffin Web Browser by CloudMosa, Inc.
And run this app. Then it will ask youto choose mobile site or desktop site. Simply choose desktop site.
That is how to use ADOBE FLASH PLAYER
To play Kancolle out if Japan you just need vpn connector.
You can use any but usually it need to be purchased. If not it will let you just 7 day free trial.
Connect vpn to Japan and run Puffin web browser