I'm with you there , hemster922 , when researching something where info is sparse or in a language that ones does not speak or 'out of my realm' reasons & etc. too !
There's plenty of a lack of info about items that are not antiques from the get-go , esp with many many mass-produced asian potteries among them .
Plenty of buyers in my area stay away from red-hued chinese/asian modern/recent-wares that are hand-painted , out of concern for the lead that is often used in the paints (PacificNW) .
A fine little source of specialized & generalized info on Chinese & Japanese hallmaks & such that I'd suggest you take a peek into would be :
www.gothebrog.comOne alternative is just web-surfin & checking ebay & like sales on sites , for pricing & perhaps gleaning bits & pieces .
I'm certainly no expert on items like yours , though !