Just got this in. Came together with the yosegaki flag presented to Tanabe Kiyamatsu upon his conscription, from Otsuka Yoshikazu of Kawasaki. Not sure if that's the city or the company (which is in the city anyway)
I wish Tanabe had scratched his name on the bugle somewhere so I could be sure these were both his.
This photo isn't part of the group, I've had it for years, but it's a good photo of a IJA bugler. Note the patch on his sleeve.