I hope you guys will forgive me for necromancing this thread, but considering the news from two weeks ago and the amount of fakes on mercari, yahoo auctions and other flea markets... It might be worth compiling info!
There's a person on twitter hunting down those fakes and sourcing the original drawings diligently to make sure people don't get tricked (right
here )
I also have
an original Toriyama drawing, in color, signed and stamped, but it's not an autograph. It was a prize that was won at a lottery (either a New Year Shueisha party, a Tezuka awards ceremony or something like that). I'd love to have it authentificated but I have no idea how, outside of careful comparisons between the traits, the stamp, the signature and how he wrote "Dragon Ball".
It was bought a while back from a surugaya-like second hand store (that sadly doesn't exist anymore), and basically it seems whomever had won it had died and their family members while downsizing sold everything to a local geek shop.
I'd love your opinion on it!