How well is Japan managing Fukushima decontamination?

Safecast, a global sensor network "for collecting and sharing radiation measurements to empower people with data about their environments," has been working in Japan since the Fukushima disaster hit. This week, the NGO released an in-depth blog post looking at the effectiveness of Japan's official decontamination efforts. Tl;dr: It's complicated. In related news, Japan has elevated its rating for the severity of the nuclear crisis.