First, this is Chinese, not Japanese.
Here's the big caveat regarding artist information:
http://www.orientaloutpost.com/forum/vi ... php?t=2407
For telling you more about the value, you need an expert:
http://www.orientaloutpost.com/forum/viewtopic.php?t=9
For $10, I will translate and give you more information about your artwork (but not a value). I am sorry to say that if I don't charge something for the expertise, I get swamped with requests for free information, and can't get anything else done. Here's that link:
http://www.orientaloutpost.com/proddeta ... rod=x-eval
I have already figured out that your artwork was written in 1989 in Cologne, Germany. So that's your little free teaser of info.
This artwork needs a lot of repair. Therefore, I hesitate to offer mounting it to a wall scroll. But we could probably make it presentable for about $50.