/jp/ - Otaku Culture

I'll preface this by saying I'm not too familiar with using 4chan, but I've encountered a quest which requires it (or so I believe). I recently attended Anime Expo 2016, and as an avid Touhou Project fan and Rinnosuke cosplayer, I was thrilled to find guest appearances by the makers of the upcoming Genso Rondo and Genso Wanderer games as well as ZUN himself! While I could go on and on about how hyped I was for our favorite beer-drinking game designer, 2 new Touhou games with promoted releases in the U.S., etc., this thread is intended to serve a different purpose.

I had already received an autograph from all of these wonderful guests when I happened upon an autograph card that somebody had dropped signed by Yuro Kyoya, the director of the recently-announced Touhou Genso Rondo: Bullet Ballet. Fortunately, everyone was required to give a name to accompany the autograph (likely to prevent resale). Unfortunately, this person had chosen the name "/jp/". This is the only site I could recall that would use that format, so I believe my best bet is to post here if I want to find the rightful owner.

I've scanned the card and attached it as reference in case anyone was interested or could clarify anything for me or give new suggestions for how I would go about returning this. I know I'd hate having attended AX this year and leaving without these mementos, so if you know whose card this is (or if you are said attendee), please post here! If you have some proof that you are said person or are in contact with said person (scans of other signed items to that name, pictures, etc.) please provide any proof and a means through which I can contact you to obtain your mailing address.

If anyone has any useful information in this situation, please post it here! Thank you for your assistance in this small quest of mine, and have a wonderful day :)