I suggest wait a while till we do a resolved move of thread.
Seeking further info Kevin as to where made, from the artist.
I'd say Japan given her heritage and perhaps preference. Thats respectful.
I can start new thread in Aus. along the lines of Kumi's work in Australia if it is made there.
Notwithstanding the fact the artist may not be regarded as a specific National, it would be good to maintain some connection to Australia for ID and research merit, I'd suggest.
Currently, we do have another Japanese artist who trained and worked in Australia, who has returned to Japan [producing], in the Australian / New Zealand section.
-edit update-
Kumi advises she did not number or date pieces and that she started making them "around 2008 and it is made in Australia."
The last part of engraving needs better photo angle to work out what it is. Easier due to location on a non-ground field and the tool used.
I suggest move to 'Far East' [Japan section for reasons above]
I'll also get better image and post new thread in Australian section [for reason also above].