I vaguely recall reading an interview with an old Niigata breeder who talked some about the development of Ochiba, but I don't recall the time frame, so tough to search for it. I believe the variety is relatively new... say 1970s with popular awareness in late '70s or early 80's? Kuroki refers to it as being gray with a greenish pattern... the Chagoi most appreciated in the post-WWII era were ones that were greenish brown. Referring to them as "green" is a bit misleading to those who do not understand that the "green" ones still were a shade of brown.
The Chagoi group were not particularly desirable among Japanese hobbyists in the post-WWII era. (Even Asagi ceased to be bred by very many breeders.) The focus was on the Gosanke and other colorful varieties. The popularity of the Chagoi group is really a fairly recent phenomenon. Ochiba have become popular, so there are a lot produced. Most are pretty ragged creatures with ill-defined pattern and flat gray base color. Sometimes you'll see one with a true Soragoi base color... a light bluish gray... and that makes the pattern pop. Personally, I like the few that have a yellowish-brown pattern, almost ochre, like an autumn leaf. But, the rust browns are nice! Since consumers like deeper color, Kohaku are being bred into Ochiba to create a redder pattern. On another board, we were discussing how this is causing some "Ochiba" to begin looking more like "Goshiki". There are Japanese breeders producing Ochiba mainly for bulk export, but my impression is that they are mainly being produced in bulk in Southeast Asia, China and domestically. Perhaps someone more up to date can chime in on that?
The breeder who fascinates me is Hosakai, the famous Asagi breeder. He has been doing a lot of experimental breeding mixing together Ochiba, Goshiki, Kohaku and Asagi. Some curios beauties come out of it.
Here are some photos to think about
:
A Hosakai "Ochiba-Goshiki", which I refer to as a reticulated Goshiki
A conventional Ochiba (displayed at BKKS National 2004)
Another Hosakai "Ochiba Goshiki", this one showing her Asagi ground.
Another "reticulated Goshiki" (mine, which I acquired as a Goshiki and he has been consistently benched as a Goshiki.... but is he?

)
A Doitsu Ochiba that you might confuse as being a Kohaku.
What's in a name?