Review: When American journalist gets close to Japan's yakuza, all bets are off

"Tokyo Vice: An American Reporter on the Police Beat in Japan" (Pantheon Books, 352 pages, $26), by Jake Adelstein: A journalist is supposed to observe and report his story, not become part of it. But by the time Jake Adelstein found himself face to face with an enforcer for one of Japan's most vicious mafia gangs, it was too late.