Once upon a time I was an obsessive font collector. Now I am happy to pick up some new font here and there. Unfortunately I am not good at bookmarking my downloads, but the most recent one - top - can be downloaded here. The second one - my favorite Aoyagi Kouzan - can be downloaded on this page.
The first one is a strict "ballpoint font", with 2nd Aoyagi more in the Shodo (brush) style, perhaps even scanned from brush writing. The bottom two fonts are intended for more conventional printed material.