Japan is expected to pass controversial security bills ... after days of fraught debates that at times descended into scuffles, tears and tantrums. The controversial laws have seen tens of thousands take to the streets in almost daily rallies for the past few weeks, in a show of public anger on a scale rarely seen in Japan. Opponents argue the new laws - which would allow the tightly restricted military to intervene overseas to defend its allies - violate Japan's pacifist constitution and could see the country dragged into American wars in far-flung parts of the globe. The changes reinterpret the constitution to allow Japan's military to fight to protect its allies, which [prime minister Shinzo] Abe argues is necessary because of threats from an increasingly belligerent China and unstable North Korea. Still, there are growing signs the campaign has taken a political toll - opinion polls show the vast majority of the public is against the bills. Protesters, including a Nobel Prize winner, popular musicians and other prominent figures, fear the changes could fundamentally alter Japan's character as a pacifist nation. Security experts said the bills would also force a re-evaluation of Japan's place on the world stage.