Necrothread time...
There's a "Tokai" Rockinbetter RG43 up for sale at the moment, so I was looking up some info and happened across this thread.
Some facts:
Tokai is a place in Japan and/or a translation of "city". The word is not copyrighted.
Tokai Gakki is a Japanese guitar maker founded in 1947, who brands their instruments "Tokai" and is commonly called "Tokai".
Tokai UK is a UK importer of guitars, including (but not limited to) Tokai.
Tokai Gakki did list Rickenbacker 6-string guitars (RG43) in their catalogue, but never a 4-string bass; the fact that they listed is 6-string guitar is no proof whatsoever that they did a bass.
Now, with a quick sleight-of-hand, Tokai UK commissioned a run of Ric bass copies, branded them Rockinbetter, and sold them as Tokai (UK) and plant the seeds for people to infer the link. Likewise they a run of 6-string guitars, even calling them "RG43" to hint at continuity, or even to satisfy existing orders?
This is not much difference to Rose Morris being the importer of Rickenbackers and also having their own Shaftesbury branded copies (made in Italian or Japanese factories), apart from the suspiciously not-dissimilar company name similarity.
To show how easy it is, anybody can set up a UK company for fifty quid and can commission a run of a hundred instruments from a factory in the far-East.
So, suppose I don my entepreneurial hat and create a company and called it "Tokai GB"; I could then get a batch of "Ronniebarker" basses made, say £10k for a run of 100, and flog them on. If I planted a few whispers here and there and gave a nonchalant shrug of my shoulders and knowingly tapped my nose any time someone asked if Tokai was involved, then hopefully the myth would perpetuate.
As for the Rockinbetters themselves, IMHO, they are adequate instruments but pretty dire copies of Rickenbackers, being the wrong scale, having dissimilar hardware, and being oversized.
The irony now is that, once they shifted production from Indonesia to China, the plans got out and everybody started making them (with fake "Rickenbacker" logos on them), to the point that the Chickenbackers became a cuckoo which pushed Rockinbetters out of the nest.
And now we have a proliferation of mediocre copies of Rockinbetters (not Rickenbackers) on the market at ridiculously low prices.