© Provided by Independent Digital News & Media LimitedThe baby is now healthy and has been discharged from hospital (Keio University Hospital/AFP/Getty Images)
A baby born weighing just under 10 ounces - the same as a large onion - has become the smallest newborn boy in the world to leave hospital safely.
The tiny new arrival weighed 268g when he was delivered at 24 weeks at Keio University Hospital in Tokyo.
He was so small that he fitted into an adult's cupped hands.
But after five months of treatment, the boy now weighs 3.23kg, is feeding normally, and has been discharged from hospital.
The Japan Times reported doctors treated him at a neonatal intensive care unit by managing his breathing and nutrition. © Provided by Independent Digital News & Media LimitedHe became the smallest newborn boy in the world to leave hospital safely (Keio University Hospital/AFP/Getty Images)
He grew steadily and was eventually able to be breastfed.
Dr Takeshi Arimitsu said: "I want people to know that babies can return home vigorous even if they are born small."
The previous record holding boy was born weighing 274g in Germany in 2009.
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