Osaka Castle Goshuin (Castle Stamp) Sumi-jo-in (Ink Castle Stamp) ② This is a Goshuin (castle stamp) from Osaka Castle. It is the Sumi-jo-in (ink castle stamp) ②. The image is a sample. Thank you. Also, if you purchase it as a set with other products, we will offer a discount, such as for the shipping cost. #YAMATO's Sumi-jo-in (Ink Castle Stamp)