I'm glad you posted a link to the larger version, because after seeing the details I will definitely be purchasing this shirt. If not for myself, then for my little sister. She, like you, is an artist and has a great love for the culture of Japan. She started a Japanese Cultural club at her High school (though it could probably be considered an anime club) & is collecting donations to send to Japan - I know she'd love to have this shirt. First & foremost I see it as a nod to more traditional mecha & that made me click on the link and look at it closer.
I was wondering, I never saw the globe at the top as, well, the world, I saw it as more of a helmet with the reflection of Japan in it. I thought that was a beautiful nod to the origin of your inspiration. Also, don't know if it was intentional, but the cat's patterns immediately made me think of a koi fish. The artwork is truly beautiful & I hope it wins. Not because it has anything to do with Japan's horrible situation, but because I think it is a wonderful tribute to how inspired you are by Japanese culture.
Looking forward to getting them. And as a side note, please feel no obligation to donate your winnings. You did the work & you deserve whatever you earn.