number of Japanese historians and educators protested against the content of New History Textbook and its treatment of Japanese wartime activities. China Radio International reported that the PRC government and people were "strongly indignant about and dissatisfied with the new Japanese history textbook for the year 2002 compiled by right-wing Japanese scholars". Subsequently, the New History Textbook was used by only 0.039% of junior high schools in Japan as of August 15, 2001. According to the Society, as of 2004, there were eight private junior high schools, one public school for the disabled in Tokyo, three public junior high schools and four public schools for the disabled in Ehime that used their textbook. Anti-Japanese demonstrations were held in the spring of 2005 in China and South Korea to protest against the New History Textbook. Protests in Beijing were supervised by the Chinese Communist Party, and Japanese flags were burned in front of the Japanese embassy. Comfort women comments In 2007, former education minister Nariaki Nakayama declared he was proud that the Liberal Democratic Party had succeeded in getting references to "wartime sex slaves" struck from most authorized history texts for junior high schools. "Our campaign worked, and people outside government also started raising their voices." 2007 passage change on forced World War II suicides Japan ordered history books to change passages on forced suicides during World War II. In June 2007, the Okinawa Prefectural Assembly officially asked the Ministry of Education of Japan to retract its instruction to downplay the military's role in mass suicide in Okinawa in 1945. More than 100,000 people in Okinawa rallied against the textbook changes at the end of September. According to the Kyodo News agency, it was the biggest staged rally on the island since its 1972 return to Japanese rule. Okinawa governor Hirokazu Nakaima spoke to the crowds, commenting that the Japanese military's involvement in the mass suicides should not be forgotten. Studies A comparative study begun in 2006 by the Asia–Pacific Research Center at Stanford University on Japanese, Chinese, Korean and US textbooks describes 99% of Japanese textbooks as having a "muted, neutral, and almost bland" tone and "by no means avoid some of the most controversial wartime moments" like the Nanjing massacre or to a lesser degree the issue of comfort women. The project, led by Stanford scholars Gi-Wook Shin and Daniel Sneider, found that less than one percent of Japanese