No, they did not ask for permission. As far as I could see they stole more arts from other artists as well. I wonder what kind of people they are. :/ But thank you so much for the information. I really appreciate it.
Not a problem friend I'm a big fan of your work and noticed the tsunade costume design right away. You should get in touch and ask them to remove, I think they've done it also with other artists for their bleach game!