Although most of these frame builders don't have a website, I was able to locate Georama, Toyo, Kalavinka, Makino, Nagasawa thru websites like njs export and tracksupermarket in Japan.

But can't seem to find where to get a Samson frame made.
Does anybody know?

Fukuoka

EDIT: here's the list of them

3RENSHO
There is not a studio currently
(Chiba pref.)


BARAMON
There is a studio in Fukuoka pref.



BOMBER PRO
There is a studio in Saitama pref.


BRIDGSTONE
There is a studio in Saitama pref.


CHERUBIM
There is a studio in Kanagawa pref.



CIVRAS
There is a studio in Ibaraki pref.


EIMEI
There is a studio in Tokyo.


ERBA
There is a studio in Kyoto pref.



EVEREST
There is not a studio currently
(Tokyo)


GANWELL
There is a studio in Kyoto pref.


GEORAMA
There is a studio in Shizuoka pref.



GIRO
There is a studio in Fukuoka pref.


IRIBE
There is a studio in Nara pref.


KALAVINKA
There is a studio in Tokyo.



KATAKURA SILK
There is not a studio currently
(Tokyo)


KIYO MIYAZAWA
There is a studio in Tokyo.


LEVEL
There is a studio in Tokyo.



LEVANT
There is a studio in Osaka pref.


LIGHTNING
There is not a studio currently
(Hiroshima pref.)


MAEDA
There is not a studio currently
(Gifu pref.)



MAKINO<(3Rensho)
There is a studio in Chiba pref.


M-IDEA
There is a studio in Osaka


NAGASAWA
There is a studio in Osaka
10 times World champion frame.



NAMBEI
There is a studio in Fukuoka pref.


OTAKI
There is a studio in Tokyo.


OSCA
There is a studio in Ibaraki pref.



PANASONIC
There is a studio in Nara pref.


PELOTON
There is a studio in Osaka pref.


PRESTO
There is a studio in Tottori pref.



PROCYON
There is a studio in Aichi pref.


RAIZIN
There is not a studio currently
(Gunma pref.)


RAP
There is a studio in Chiba pref.



REMINTON
There is not a studio currently
(Gunma pref.)


SAMSON
There is a studio in Fukuoka pref.


SHARK ISLAND
There is not a studio currently
(Kochi pref.)



SHIMAZAKI
There is a studio in Tokyo.


STRATOS
There is a studio in Kanagawa pref.


UMEZAWA
There is a studio in Ehime pref.



UNO
There is not a studio currently
(Chiba pref.)


VIVALO
There is not a studio currently
(Hyogo pref.)


VENUS
There is not a studio currently(Tokyo).



VOGUE
There is a studio in Kanagawa pref.


WATANABE
There is a studio in Tokyo.


YANAGISAWA
There is a studio in Tokyo.

any website or contact information for them?

Don't know of a site but you can try a phone directory.

right, but what phone number?

you should contact tomity. he lives in tokyo and knows more then anyone about keirin.
you should be able to find his webpage via google.

Yes! Thanks!

I just searched in Japanese and now Google comes up with
Samson Fukuoka
サムソン　福岡
https://www.eonet.ne.jp/~takubow21/cy...derfure-mu.htm