An article from January, 2008 about the fact that Interac ALTs do not get all of what they are entitled to by law.
http://search.japantimes.co.jp/cgi-bin/nn20080105f1.html
THIS FOREIGN LAND
Assistant language teachers in trying timesBy KANAKO TAKAHARA
Staff writer
Last of four partsIn November, Samantha Bouton, an assistant language teacher working at a public elementary school in the rural town of Shibayama, Chiba Prefecture, had a fever of 38.5 degrees and was diagnosed as suffering bronchitis.
Because of her illness, Bouton, a 25-year-old U.S. native from Oregon who has been teaching in Japan’s public schools since 2004, had to take leave for two weeks.
But her employer, Interac, a temp staff dispatch agency and leading provider of ALTs in Japan, told her she had already used up her seven days of annual paid leave — less than the 12 days she is entitled to under labor law — to cover the days she was sick.