Yasujiro bikes - dont see that this has been mentioned here before...

Yasujiro

Tange as a brand is still around. Ownership transferred, but the brand exists and still churns out tubing in multiple levels.
Anyways, Yasujiro is the first name of the founder and the company produces bikes under the name.

They aren't old, but many certainly have classic aesthetics and build. 1" steered, lugged, level top tube, etc.

I always like looking around at new frames inspired by yesteryear.