This is Japanese cheesecake which is lighter and fluffier than the traditional baked cheesecake most people are familiar with. In Japan this is called a "souffle cheesecake", the other two options you will find there are "baked cheesecake" and "rare cheesecake". The rare option is a mix of rare ingredients left to set in the fridge.
I don't think the recipe I got produced a 100% result. I found one saying that you should add cream which I wasn't sure about and I didn't beat my egg whites as well as I should have done. Oh well, it's still om nom nom and now I have an excuse to try again.
Hopefully I get it perfect and then I can drop a box into the local pub :D
Do you have a recipe for me to try?