A Japanese mafia boss has pleaded guilty to conspiring to traffic uranium and plutonium from Myanmar to Iran along with drug trafficking and weapons offences. Takeshi Ebisawa, 60, a member of the yakuza, disclosed to an undercover agent for the Drug Enforcement Administration (DEA) that he had acquired a large quantity of thorium and uranium that he wished to sell. He then offered to supply the agent with plutonium that would be even “better” and more “powerful” than uranium for making nuclear weapons. “Today’s…