Subsoft, a unit of Ziran Jisyo Security, has signed a strategic partnership with Japanese security company JSecurity and Exosphere Labs to expand its mobile and PC integrated security solutions business in Japan, it said on Sunday. The three companies plan to combine their capabilities to target the Japanese market with an integrated security system covering mobile devices and PCs. Subsoft will handle mobile security technology and product development, while Exosphere Labs will provide PC endpoint security solutions. JSecurity will oversee local distribution and marketing.