Having a particular fondness for brass-inlaid tsuba, I eventually added several pieces from the Washida school of fittings makers to my collection.
This sparked my interest in learning more about the school and its production. Over time I gathered a fair amount of information and eventually decided to compile it into a single document, which you can find in the download section of the board:
https://www.militaria.co.za/nmb/files/file/210-the-shōnai-washida-school/
I hope you enjoy reading it as much as I enjoyed putting it together. As I mentioned, given my particular weakness for brass inlay, the document is somewhat biased toward the work of Washida Mitsunaka!
Just as an example of the Washida production here are the pieces from this school (or supposed to be from this school) in my collection:
NBTHK Hozon to Washida. Dimensions 85.4 mm x 85.3 mm, thickness 3.9 at seppa dai, 4.2 at mimi.
NBTHK Hozon to Washida. Dimensions 85.3mm x 79.2 mm, thickness 3.6 at seppa dai, 4.0 at mimi.
Identical to tsuba attributed by NBTHK to Washida. Dimensions 87.2 mm x 82.2 mm, thickness 3.7 at seppa dai, 4.0 at mimi.
Signed in kinzogan mei Kyozan Mitsunaka with Kao. Dimensions 87.2 mm x 77.6 mm, thickness 2.6 at seppa dai, 4.2 at mimi.
Dimensions 83.5 mm x 78.6 mm, thickness 3.0 at seppa dai, 4.1 at mimi.
Dimensions: 96.9 mm x 13.9 mm, thickness 4.7 mm.
REgards
Luca