Yes, they make some fine trim beads too, triangles, cubes and 8/0
cylinders. So Does Toho. I think Toho's triangle beads are really
nicely made. Miyuki makes triangles too but they are different, more
rounded and slightly more uniform but Toho's got nicer finishes in trim
beads, I think. Besides uniformity of size the japanese beads also have
more durable finishes in most cases.

Here's a link to their website, they don't have much there but there
are some pictures
http://www.miyuki-beads.co.jp/beads.html