To have your work deleted by the company that manages the service where your illustration has been republished, you will need to contact the service and state to them that you are the author of the work.
If your illustration has been republished on a third-party website, we ask that users send a statement to the operator/customer support department of the corresponding website proving that you are the author of your content. If your illustration is not deleted after this, please contact pixiv again.
The operators of pixiv will also provide support in proving your claim to have the offending work deleted.
Because our company’s position in making a request to have your work deleted is only that of a third party and may not be very effective, we ask for your understanding in underlining the need for a statement from you the author.
If the original content no longer exists, it may not be possible to take action. Therefore, gather as much proof as possible that the offending content is yours, and then send your statement to the website operator.
If your content has been republished on a website that operates outside Japan, refer to the template below, and request that your content be deleted.
I would like to inform you that your website contain my works that are reposted at your website without consent.
I'm sorry, but can you please take my works off your website as soon as possible?
I'm sorry for any inconvenience it may have caused you. Thank you very much.
Corresponded URL: (URL where content is being posted)
Original posting of my work: (URL where you originally posted your content)