Jotaro is a craftsman and a perfectionist. He is constantly testing out his gear himself, way up in the Japan Alps and in the rest of the world, all year. And the workmanship is flawless (his offerings wouldn't sell in Japan were they any less). I can't afford one of his beautiful shelters at the moment, but I very much want to buy one of his Khufu shelters when I can, not just for having a well-made shelter, but for the joy of having something so beautiful. When I saw in person his cuben Khufu back in 2010 when he, Glen, and a number of other UL hikers in Japan went hiking west of Tokyo, I was entranced by how "jewel-like" it was. You have to see one to see what I mean. And if you do any of your own sewing and patterning, you will fall in love with the craftsmanship, it's that special.
Plus, you don't have to wait forever to get one of his items.