Somehow, Japanese keyboard enthusiasts are way overrepresented among my Twitter followers so I'm quite exposed to all the cool stuff happening there.
My only problem is, I have a hard time to figure out if what I see is a new and original design or simply a photo of something being around for a while.
Regardless, the Tenalice Ambidextrous showed up in too many posts recently to raise my attention.
The Ambidextrous is the latest revision of Cerbekos' Tenalice (tenkey + Alice) Alice style monoblock keyboards with a number pad between the angled halves.
While the numpad angle of the previous version indicated it was designed with right-handed users in mind, the tenkey part of the Ambidextrous is positioned perfectly symmetrically in the center, in 45°, so you can reach it with the same effort regardless of your dominant hand.
As far as I can tell, the project is only partially open-source: the plate and stacked case files are public, but I couldn't find the PCB files. Kits are available on Booth.