Divekick Japan (stacking version) is all in Japanese. Here's the menu options with English translation/equivalent:
When you select Versus (Online), here is the menu option (make sure you select Ranked):
From the main menu, press left twice and you will then select Options with . Here is the Options menu/settings you'll want for Story Mode (thanks to MainComptonese for validating difficulty):
Sorry for the image quality, my iPhone sucks, but this is much better than nothing.