并列题名：Research on housing security and housing policy in Japan Research on housing security and housing policy in Japan 并列题名：Research on fiscal security and risk in China 并列题名：Research on elderly housing design in urban 并列题名：Research of social security in Japan 并列题名：Research on the environmental policy of Japan 并列题名：Research on urban planning law in Japan 并列题名：Research on trade security policy and practice 并列题名：Research on the management of social security of floating population in China 并列题名：Urban housing security system in China