Mythopoet
Auror
I'm not seeing a lot of American print novels right now with Japanese influences. There's all manner of manga-influenced online works, and I'm seeing some stuff on American TV with an anime influence, but novels written in America for distribution in bookstores seem to prefer to use American comics as influences. I think there's more of a market to be tapped than people realize, not by trying to draw in Japanophiles (who would rather read manga or watch anime), but by introducing ideas and themes from Japanese media to Americans who aren't necessarily familiar with them.
Being something of a Japanophile, my fantasy world has a significant Japanese influence. Though I am not just influenced by modern Japanese media but have also done some reading into Japanese religion, mythology and history which I find fascinating.
For instance, my world's version of vampires/blood drinkers are called Akuma (a Japanese word for monsters) and practice a religion that is a mix of Buddhism and Shinto in order to maintain discipline over their nature and rid themselves of desires that distract from the mission of their race.