This is the Kawai K4 hub.
Posts about the Kawai K4 on this site:
See also the Kawai K4 and K4R group on Facebook.
Factory Patch Charts
Here is an ongoing project to document the Kawai K4 factory patches as charts.
The K4 user manual has blank charts for all the patch types. As a side effect of making a utility library for a Kawai K4 patch editor, I created a command-line tool which, among other things, can generate HTML pages like those charts.
You can have a look at a sample listing for the A401 bank. There is a lot of information still missing (like drum settings and effect patches, and some of the single patch parameters), and there may be some errors, but I would appreciate feedback about it. Hopefully it is useful to you!