Archaeologists are investigating the human remains of more than 1,500 people believed to have died in a 19th-century epidemic in Japan.
- The remains have been found during a development project in Osaka
- Some experts believe this could have been a mass grave of people who died of syphilis
- A report into the findings is expected at the end of 2021
The mass grave, named the Umeda Grave, had been dug up during excavations for a city development project in Osaka.