Japanese (?) Teacup and Saucer I found today

I was looking for some guidance on my little teacup. It caught my eye because the hand painting was unusual for pieces I usually see around here. When I picked it up I realized how INCREDIBLY thin the porecelain was. I own bone china pieces and this is much thinner. Im thinking Japanese Eggshell Porcelain.
It is handpainted and has a significant through and through crack, I could actually feel it shifting under my finger when I rubbed it at the store to see how significant it was.
Im considering using the Kintsugi technique to repair it and want to get opinions on possible age and design style before I decide to repair it myself or send it off to be repaired by an expert. Im pretty skilled, but Id hate to not do justice to the piece with my repair if the cup is in fact an antique or special in anyway. I have zero experience with Japanese Porcelain and this is unmarked so I don't really have a way to start. I did google image search and there seems to be some similarities in design to Kutsani, but I can't find anything with that wavy design like mine.

Thank you for any help or expertise you can provide, I really appreciate it!