The Shiomi family specialized in togidashi-e technique and were famous for their work of extremely high quality. Successive generations continued using "Shiomi Masanari" thus it is difficult to pinpoint down the date of the pieces signed in such a way. This example was most likely made by a later family member in late 18th to early 19th century. For a nearly identical inro with the same rats design, see lot 392 in Christie's sale The Japanese Aesthetic on May 14th 2013. This item is in the category "Antiques\Asian Antiques\Japan\Other Japanese Antiques".
The seller is "gallery-t" and is located in this country: US. This item can be shipped worldwide.