Furukawa power cables

No no no. Get one of those $100 cords and report back so we will know. Audiogon is also work.

Curious as to why “made in Japan" cables ship predominately from China and Hong Kong?

Not familiar with them, but do find this odd (just ran an Ebay search).

DeKay

It does look like a legitimate company, but it is odd that all products ship from China. I have bought Japanese products, such as Oyaide, and they all ship from Japan and are expensive.
Perhaps China is their worldwide distribution center; perhaps not. I would contact Furukawa on their website.

Some Sony products are made in China. Some "made in USA" products like iPhone and many audio products are made in China, I.e., manufactured or assembled in China. All tennis rackets including Yonex, a Japanese company, and Babolat, a French company, are you guessed it, made in China. It's much much cheaper skilled labor in China.