Shakudo fuchikashira decorated with mouse/rat and Hoju, a Sacred Jewel. I am not sure about the School but surface treatment and realistic depiction of the mouse point to Jochiku School. Both mouse and jewel are made in a very high relief.
Fuchikashira made of shakudo with mouse made of silver. Jewel covered with very thick gold foil.
Please take a closer look at the photos. There are a lot of damages.
Made in 19th century
Size:
Fuchi: 37 mm x 22 mm x 12 mm
Kashira: 34 mm x 18 mm x 9 mm