Don't see those very often , had one when I was a kid , my older brother sold my 22 rifle for me so I could get a new bike , and that's what I ended up with , same color also , I found a green one once but have been keeping my eyes out for a yellow .
Wasn't really made for jumping unfortunately
So it didn't last long the frame broke right up behind the head tube.
Nishiki was just a brand name for imported bikes distributed by West Coast Cycle in the US. Most of the early bikes were made by Kawamura, and later bikes were made by Giant-- but other firms provided bikes for WCC as well. If yours has a ¨Made in Japan¨ sticker on it and the first letter in the serial is a ¨K,¨ it was made by Kawamura.... which was an outstanding Japanese bike manufacturer that has little to no name recognition in the USA b/c of the Nishiki distribution deal.