Omron, Sony, and Honda. For example, 80% of Omron's Kyoto factory staff of 82 had disabilities, with the majority having severe disabilities. These employees earn an average of 3 million yen per year, which is above the minimum wage. At the end of 2002, all prefectural governments and 91.5% of local city governments had developed basic plans for citizens with disabilities. In June, the Disabled Persons Fundamental Law was revised, obligating all municipalities to draw up formal plans for the disabled. As of June 2015, Japan has ratified the Convention on the Rights of Persons with Disabilities but not signed nor ratified the Optional Protocol to the Convention on the Rights of Persons with Disabilities. Minorities Burakumin, Koreans, Chinese, and alien workers experienced varying degrees of societal discrimination, some of it severe and longstanding. The approximately 3 million Burakumin (descendants of feudal era "outcasts"), although not subject to governmental discrimination, frequently were victims of entrenched societal discrimination, including restricted access to housing and employment opportunities. According to the MOJ, there were nearly 1.85 million legal foreign residents as of 2002. The largest group, at approximately 625,400, was ethnic Koreans, followed by Chinese, Brazilians, and Filipinos. Despite improvements in legal safeguards against discrimination, Korean permanent residents (so-called Zainichi Koreans, most of whom were born, raised, and educated in Japan) were subject to various forms of deeply entrenched societal discrimination. Harassment and threats against pro-North Korean organizations and persons reportedly have increased since the 2002 admission by North Korea that it had kidnapped more than a dozen Japanese citizens. Other foreigners also were subject to discrimination. There was a widespread perception among Japanese citizens that foreigners committed many crimes. According to a government survey, more than 70% of citizens worried that an increase in the number of illegally employed foreign workers could undermine public safety and result in human rights abuses against the workers themselves. Nevertheless, more than 80% said the country should accept foreign laborers conditionally or unconditionally. As of May 2019, Japan has not ratified the Convention against Discrimination in Education. Worker rights Right of association The Constitution provides for the right of workers to associate freely in unions. Sexual harassment law in the workplace The Equal Employment Opportunity Law of Japan created in 1972 only advises or recommends employers to take measures to prevent sexual harassment. Sexual harassment is the most reported category labor cases at the Ministry of