I apologize in advance, for I know this is not 'Antique', but I would be grateful if you either know what this mark means... or could perhaps direct me to someone who could quickly explain.
Your mark is Japanese. The two first characters says Kutani (= nine valleys). Since the rest of the marks seems to be a signature of the potter and I am not that good on Japanese porcelein to be certain, I suggest you make a special search for "Kutani" on the web and sees what comes up. If you need further help, please contact me.