Azuki is similar to Nishiki as both brands were distributed by West Coast Cycle and manufactured by Kawamura in Japan. From what I have seen they mostly made road bikes, but I found some cruisers and BMX bikes also. I believe this brand was much less popular than Nishiki, as I see way fewer for sale out in the local market or even on Ebay. Japan was making some good bikes during this period, so they should be quality made. I think the brand started in the early to mid-70s and seems to have disappeared sometime in the 80s.
Century – entry level road bike
Classic – entry level road bike
Duster – BMX bike
Elite – mid level touring bike
Gran Sport – entry level road bike
Gran Sport Mixte – mixte cruiser
Imperial – mid level road bike
Raider – BMX bike
Rally Sport – entry level road bike
I don’t think there is much of a following for Azuki, though Japanese bikes of this period do have a following. While I saw it suggested they had a full line and there might be higher level bikes out there, the best I could find evidence for are mid-level road bikes. In my area most models in good condition are worth about $100. The Elite and Imperial in excellent condition might get up to $200.
Azuki Gran Sport