What do you have in mind for the style and theme of the landing page?
It would be good to stick work with something that works with our logo (view http://www.nihongomaster.com). See our homepage for some inspiration; however, we're trying to move slightly away from such animated/drawing design.
Elements to include in the landing page
Main call to action should be something along the lines of "Start learning Japanese Online". There should be an existing user login button at the top as secondary call to action.
You can see our features listed on https://www.nihongomaster.com/ however they're kind of text heavy. We'd love to get inspiration to make this more visual. Duolingo's page does this well.
Getting away from the japanese animation style and more to a friendly and simple design.