1. R. Koyama, “Towards Effective Countermeasures Against Reputation Damage,” Institute for Int. Studies and Training (IIST) e-Magazine, 2013.
2. R. Koyama and H. Ishii, “The Systemization of Radioactivity Inspection for Food Products and Steps to Counteract Reputational Damage in Fukushima, Japan,” J. of Commerce, Economics and Economic History, Vol.82, No.4, pp. 15-22, 2014.
3. R. Koyama, “The Influence and Damage caused by the Nuclear Disaster on Fukushima’s Agriculture,” J. of Commerce, Economics and Economic History, Vol.81, No.4, pp. 11-21, 2013.
4. R. Koyama, “Farmland Radiation Dose Distribution Map and Food Safety Inspection Systematization,” J. of Commerce, Economics and Economic History, Vol.81, No.2, pp. 5-13, 2012.
5. Ministry of Agriculture, Forestry and Fisheries, “Extent of transfer of radioactive cesium in agricultural soil to vegetables and fruits,” 2011 (in Japanese).