The Japanese box office in 2007 dropped 2.2 percent below the previous year, although admissions remained virtually flat, Daily Variety reported today (Tuesday), without explaining the reason for the lower gross. (The only apparent -- albeit unlikely -- explanation is that ticket prices were marked down somewhat during the year.) The Motion Picture Producers Association of Japan reported total earnings of $1.9 billion on 163 million admissions. The biggest hit of the year was Pirates Of The Caribbean: At World's End, which grossed $103 million.