How to Make Fluffy and Moist Cheesecake (Original Recipe)

Remember that in my water park post I mentioned my friend's amazing Cheesecake? She shared with me the recipe and I thought you guys would love to learn how to make it too! Here is R's original recipe.
Did you know there's a pretty big difference in Japanese and American style cheesecakes? Japanese cheesecake has a light spongey texture, little bit tart, and prettier in appearance (oh but it's only the truth). Whereas American style is more dense and sweeter and are often added with other flavors.
Original recipe from my friend below.