“…In addition, because of the damage to the Fukushima nuclear plant, the materials for recycling also had to be monitored for potential radioactivity (United Nations Environment Programme, 2012), as it was found that the incinerated waste residue around Fukushima resulted in increased radioactivity (associated with radiocesium) (Saffarzadeh et al, 2014). Soil contaminated by tsunami-related deposits mainly contained gypsum-and limebased deposits and naturally occurring heavy metals and required proper treatment with appropriate techniques for separating the contaminants or immobilization of the heavy metals to preserve the living environment and maintain public health (Ohta et al, 2016;Uno, 2015). The rotatory crushing and mixing method can be applied for the separation, crushing, and removal of disaster waste and restoration of farmland with soil (Nakajima et al, 2015).…”