In November 1975, the Osaka branch of the Buraku Liberation League was tipped off about the existence of a book called "A Comprehensive List of Buraku Area Names" ( "Tokushu Buraku Chimei Sōkan"). Investigations revealed that copies of the hand-written 330-page book were being secretly sold by an Osaka-based firm to numerous firms and individuals throughout Japan by a mail order service called Cablenet, at between ¥5,000 and ¥50,000 per copy. The book contained a nationwide list of all the names and locations of "buraku" settlements (as well as the primary means of employment of their inhabitants), which could be compared against people's addresses to determine if they were "buraku" residents. The preface contained the following message: "At this time, we have decided to go against public opinion and create this book personnel managers grappling with employment issues, and families pained by problems with their children's marriages."