While searching for some Greco information I came across a post by Uli on a German website detailing the brands produced by top Japanese manufacturers of the late 60's - early 70's.
Since the original post is in German I'm not sure it pops up in English language searches so I'm reproducing it here so I can find it next time I need to see who may have produced an obscure brand. Looks like Uli has done good work and the list appears fairly accurate. As I get more information I'll update/correct this list. Please post your corrections/additions and I'll add your suggestions to the list.
Fujigen Gakki:
Contract Manufacturing for: Antoria, Epiphone, Greco, Ibanez, Jason, Mann, Odessa, Orville by Gibson, Penco, Univox, Yamaha, Kent, Hohner
Sales Brands: Oakland, Beck Bridge, Goldentone Grant Isonez, P. visitors, Pearl, Polaris, Sakai, Ventura
Guyatone:
Exclusive: Capri, Crown, GUYATONE, Guya, Fandel, Imperial, Saturn
Contract Manufacturing for: Apollo, Audition, Decca, Domino, Futurama, Hondo, Kent, Kingston, Ibanez, Orpheum, Silvertone, Suzuki
Sales Brands: Barclay, Beltone, Broadway, Capri, Crestwood, Elko, Feather, G. Rossi, Howard, Hi-Lo, Ideal, Johnny Guitar, Kimberly, Lafayette, Lindell, Maier, Marco Polo, Marquis, Maximus, Melodies, Montclair, Omega, Orpheus, Prestige, Recco, Royalist, St George, Silhouette, Sorrento, Toledo, Vernon, Victoria, Zen-On, Zenta
Kasuga:
Exclusive: Kasuga, Tokai, Goban
Contract Manufacturing for: Burny, Conrad, Fernandes, Hondo
Sales Brands: Heerby, Ganson, Emperador, Madeira, Asco, Orville
Kawai/Teisco:
Exclusive: Del Rey, Kawai, Teisco, Teisco Del Rey
Contract Manufacturing for: Arbiter, Audition, Apollo, CBS, Decca, Imperial, Kay, Kent, Kingston, Ibanez (60's), Noble, Silvertone, Tele Star
Sales Brands: Arirang, Band Master, Barth, Daimaru, Devoc, Diasonic, Dispender, Duke, Heit Deluxe, Hi-Lo, Holiday, Jedson, Kimberly, Keefy, Lindell, Melody, MCM, Noble, Prestige, Philharmonic, Randall, Regina, Rexina, Sakai, Satellite, St Georges, Schaffer, Shadow, Sorrento, Sterling, Swinger, Tonemaster, Top Twenty, Winston, Zeus
Matsumoku:
Exclusive: Arai, Aria, Aria Diamond, Electra, Stewart, Tempo, Ventura, Westbury
Contract Manufacturing for: Columbus, Conrad, Domino, Epiphone, Greco, GUYATONE, Ibanez, Washburn (Wing-and Stage-series), Westone, Yamaha
Sales Brands: Arita, Barclay, Cimar, Custom, Dia, El Maya, Fell, Gallan, Gigan, Hi.Lo, Howard, Lindberg, Lyle, Luxor, Maxitone, Maya, Mayfair, Montclair, Pan, P. visitors, Raven, Sekova, Skylark, Univox , Vision, Volhox
Tombo:
Exclusive: Morris
Contract Manufacturing for: Norma
Marks Distribution: Angelica, Asama, Columbus, Condor, Duke, Horugel, Kinor, Montaya, Queen, Regina, Schaffer, Yamato
Terada
Contract Manufacturing for: Grapham, Gretch, Joo Dee, Morris, Orville, Vesta and Fender Japan
Other brands that need classifying:
Ayar, Astrotone, Beeton, Bradford, Bruno, Conqueror, Calif., Canora, Cipher, Coronado, Cutler, Demian, Eros, Fresher, Holiday, Intersport Mark Lero, Mako, Marlin, Master, Matador, Mellowtone , Memphis, Montaya, Orlando, Pleasant, Regent, Sigma, Solola, Tamaki, Trump, MegaTones, Westminster ...