A Japanese crime boss got the shaft.

But it still wasn’t enough.

Prosecutors say 70-year-old Yakuza kingpin Satoru Nomura – don of the Kudo-kai crime syndicate – demanded “organized retaliation” after penis enlargement surgery paled to his expansive expectations.

So Nomura allegedly ordered a hit on the female nurse who participated in the penis empowering procedure.

The Japan Times reports that the crime boss “unjustifiably resented the failed surgery” and blamed the phallus failure on the nurse.

Nomura had the procedure done at a cosmetic surgery clinic in August 2012.

On her way home from the clinic, the nurse was stabbed in the neck and chest by an underling of Nomura.

“The motive for the incident was a personal grudge on the part of Nomura,” the prosecution said, according to the Tokyo Reporter.

The longtime Yakuza “member” has a long history with cops.

He was accused of tax evasion and was fined nearly $8 million in 2015. The year before, he was charged with publicly shooting a man in the back.

bhunter@postmedia.com