Hey, I was wondering if anyone who can read Japanese (and possibly who has a better gasp on the intricacies of the various RPGMaker/Wolf licenses) can clarify if this website actually says what I think it says. The Creative Commons link on this page, and the accompanying charmingly-translated "There is no limit individual and corporate, for-profit and non-profit use." seems to imply that the material's free and clear under an Unported license, but I've been bumfuzzled before and I'd like to know where I stand before inadvertently biting someone's rhymes. That said, this is some pretty awesome-looking stuff, so if we're cool I'll post it under art.
I can't read Japanese at all, but judging by what I see on there what they're saying is that they're just displaying the work they've collected from other sources and that they're not putting any additional restrictions on use. If you find a resource from there you want to use I highly encourage you to find the original creator's site and see if you can find what the licence is from there. I do know that anything that's an edit of RPG Maker's RTP (the resources that come with RPG Maker) can only be used in Enterbrain products regardless of what the editing artist says.
Some of the art on display there is actually a preview of art made for the RPG Maker store. Some of those can be bought with a "Non-RM Licence" meaning you can use it without the "only RPG Maker" restrictions. Here's the link to the store: http://www.rpgmakerweb.com/products/non-rm