It looks to be very nice.
My postmaster was in a WW II Marine bomber squadron [quite rare!] and brought back an enlisted NCO sword. I'm told the pebbly white material is sharkskin. Kinda neat. My postmasters sword had little metal prayer thingies stuck under the braid, like the mums in your sword.
IIRC, the entire grip assembly is held on by one bamboo pin, sealed in place with ink. Supposedly, it was common for the owner to write his death poem/verse on a paper and place it inside the grip. The maker's name [in Kanji?] would also be inside the grip, inscribed on the concealed blade haft.
That exhausts my knowledge of Japanese swords.
