Turbolinux will acquire Japanese PHP tools vendor Zend Japan, the company announced Wednesday.Turbolinux bought a 90 percent stake in Zend from Open Source Japan, Zend’s parent company, with a view to increasing distribution of its PHP development tools. Zend will remain the exclusive distributor for its Zend products, along with sales and support for Turbolinux.Negotiations for the deal were completed March 30 but not announced until April 5. The company claims leadership in Linux operating system sales in both China and Japan, with over 60 percent of China Linux sales, it said. Software DevelopmentOpen SourceTechnology IndustrySmall and Medium Business