McKenzie Walker has started her junior year in high school, but her most educational experience may have been the six weeks she spent by herself in Japan ? next door to a bathhouse.
Walker, 16, of Sweet Home, spent July 13-Aug. 24 with the family of Saku Shimada, whom she met when Shimada was a Josai exchange student at Sweet Home High School in 2003-04.
Shimada, now 19, lived a few houses away from the…