A kind Japanese man saved the life of a giant murder hornet with his own mini-surgery by removing a parasite from its stomach.

Insect enthusiast Kurosyamo was out in his garden when he noticed the Asian giant hornet “showing unusual behaviour” in Tokyo, Japan.

The hobbyist had a hunch that it might have been infected with a parasite so he caught the creature and took it inside his house to “rescue.”

Stomach-churning close-up footage shows the DIY vet using tweezers to pull a gooey white worm from the murder hornet's belly.

Kurosyamo said: “It was hard to see but I was pretty sure that the hornet had a parasite in its belly. I'm not a professional but you have to be knowledgeable to successfully do this.”

The insect lover slowly pulled out the parasitic worm and carefully laid it on his finger to clearly show it to the camera. He released the hornet afterwards and fed the parasite to his pet frog.

He added: “I was actually very sick that time. You could even hear me coughing on the video but I felt really bad for the hornet. I have seen that behaviour before on other hornets and wasps so I thought I should help the creature that time.”

The large parasite found inside the hornet's stomach was a female Strepsiptera, which attaches to hosts such as bees, wasps, grasshoppers and leafhoppers. The parasite controls its host to avoid colony tasks and cluster on vegetation so it could mate with other Strepsipteras.