I downloaded this plugin because of the plugin's claim "WP SiteManager is an integrated package comprising of necessary functions for using WordPress as a CMS."
I'm not shy when it comes to Japanese... If the plugin lives up to itS claim, I'm willing to live with the language issue. Nonetheless, the download page is misleading. Why waste everyones time? For consistency make the download page Japanese too.
That said, in my opinion, the one defining feature that makes WP into a CMS is custom post types. I found no mention of it in the plugin settings. To be fair, there is a list of functions on the plugin download page that the plugin seems to support. But nowhere near approaching the sophistication of other plugins.
I give this one star because a) no English b) no true CMS functionality.