Liberal Democratic Party Secretary General Tsutomu Takebe refused Monday to rule out the possibility of suing Hisayasu Nagata, a lawmaker from the Democratic Party of Japan, over his allegation that Takebe's second son had shady financial connections with jailed Livedoor Co. founder Takafumi Horie.
Nagata has claimed that a copy of an e-mail, which he obtained last week, shows that Horie ordered Livedoor Co. staff to transfer 30 million yen to the son's bank account.
The DPJ has withheld additional details about the e-mail, including the identity of its source and the remittee's bank account number, citing the need to ensure the source's safety.