Prosecutors on Wednesday demanded prison terms for two former executives of a defunct Tokyo trading firm charged with illegally shipping parts for antitank rocket launchers to Iran.

At the final hearing at the Tokyo District Court, prosecutors sought two-year prison sentences and fines of 1.5 million yen for Ichiro Takahashi, 63, and Tsuneo Ishida, 67. Prosecutors said the defendants' actions were "self-centered and based on greed."

They said the offense contravened government regulations on exports of weapons, adding that Takahashi and Ishida both bear grave responsibility because the technology they exported was vital to the building of the launchers.