E-book publisher Buttontapper Press is a new press that has a call for submissions for some Haiku anthologies but if you scroll down the page you'll find a call for Ninja novellas that they'd like to publish in 2014. They're looking for "creative and humorous takes on the ninja genre". There's no mention of payment but they're paying a percentage of royalties on the Haiku anthologies. You might want to query first before you submit to get more details. You can find the submission guidelines here.
And a caution. While checking out the press I clicked on their author page and found a list with quite a few of the online crime writers that many of you are familiar with. I contacted one of the writers and he told me that the owner/publisher, Laura Roberts, had published a story of his and the other crime writers on the list in the special noir issue for Black Heart Magazine.