Thank you for the comment about my sketchbook.!
I have not table at SDCC.
We can't speak English well,but please feel free to speak if you find us. Also,trade with your sketchbook is anytime welcome. However, it might be impossible to find us in the convention center.
I haven't yet decided specifically about on-line sales. It thinks about on-line sales if there is a stock after coming back to Japan.