Confirmation !!!
Hey all, I emailed Ryan Bell
http://japanesebonsaipots.net/ Ryan says Yorozuen is one of the most reputable bonsai nurseries and pot sellers in Japan. The signature clearly reads :Gyozan Made", however, he cant attest to whether its Yuuji (son) or father Nakano Yukizou. He also said Yorozuen is one of the highest of provenances out there, so if they say its Yuuji, He wouldnt doubt it at all.
Thanks Ryan!
I bought the pot on ebay from Yorozuen & it was advertised as "Nakano Gyozan" so I will take it as that. I have also seen pots from Yorozuen advertised as "Yuuji Gyozan" son of Nakano Gyozan, which leads me to believe Yorozuen knows the difference between father & son.
I'm satisfied with this information & I thank Ryan Bell again