One of the major manufacturing companies in Japan, Miyata has produced frames under their own name, as well as many others such as Univega.  Miyata is also known for drawing it's own steel tubing and being one of the pioneers of triple-butted tubing.  The Miyata 1000 from the mid-1980's is regarded as one of the best off-the-shelf touring bicycles ever produced and are still sought after today.