Koumei Satou working on a sequel to Mistake of Pythagoras? Or probably not.

Longtime Half-Life 1 / Source mod players may remember Koumei Satou, who made crazy quirky single player mods like Sweet Half-Life (HEV scientists with SMGs; a boss fight in the room from Brazil), Peaces Like Us (one of the first mods with friendly Xen aliens), and Mistake of Pythagoras (an HL2 mod where one of the puzzles is deriving the Pythagorean theorem!)

Now, apparently, he has some sort of blog post where he's talking about workflow from Hammer to XSI Mod Tool to SketchUp to Hammer (?!) and it looks like some sort of sequel to Mistake of Pythagoras. The machine translation of the page doesn't provide much more insight, it sounds more like he's lamenting that everyone's ditching the Source mod scene for UDK and Unity. Am I reading correctly?

(Thanks to @Orihaus for the info)