The past several years I became aware of JDM fishing rods because I've been doing more ultralight fishing. I never bought a finished rod because I prefer to build my own. I haven't found blank components on Digitaka, Plat, JP Angler - only completed rods. I've heard of Yamaga blanks, but they seem to only sell finished rods.
I recently found a Japanese company called Richards that produce OEM blanks, as well as their own Suzuki brand label. Apparently they've made blanks for 60 years in Japan.
OEM production of various kinds of fishing rod, SUZUKI Blanks | Richards Inc.
Anyone ever heard, or used the Richards Suzuki rods? The members here are more knowledgeable about JDM products than me. I'm tempted to build an ultralight, panfish rod using one of their blanks.
I built myself an ultralight rod on a Rainshadow Revelation blank. It's very light and sensitive. It performs great.