Installing a Japanese game is one of the most frustrating parts of playing one - at least, the first time you do it. You may be told that an app is incompatible with your device, and give up at that. That's not actually the case - that's a message given by app stores when a product is only licensed in another region of the world. Thankfully, there are ways around that.
There are a variety of ways to play JP games on Android devices, but QooApp is by far the easiest. Apps are updated very quickly, so you will usually be able to download an update soon after it has come out. It is also easier to buy Gems on Android devices than on iOS devices, but that is done via Google Play and not QooApp.
- On your Android device, visit app.qoo-app.com/en/app/880 and install the app from there.
- QooApp acts as a secondary app store, apart from Google Play. Open QooApp and search for Valkyrie Anatomia.
- Download and install Valkyrie Anatomia.
Pictures help more than words here, but since I don't have an iDevice, I can't provide them. Instead, here is an external site that has a step-by-step guide with pictures to help you along.