Osaka Municipal Assembly members from Mayor Toru Hashimoto's Osaka Ishin no Kai (One Osaka) group are pursuing allegations that a city labor union attempted to gather votes for Hashimoto's opponent in last November's election in possible violation of campaign laws.

The allegations surfaced Monday when Osaka Ishin no Kai announced it had obtained a 36-page list of 1,800 names of municipal transport workers from a city employee, who told the group the list had been drawn up by the city transport worker union in an effort to support former Mayor Kunio Hiramatsu in the November mayoral race.

The list calls for passing out separate forms that ask for introductions to the workers' friends and acquaintances on behalf of Hiramatsu. The forms were created by Hiramatsu's campaign staff and have his picture at the top.