A war-displaced Japanese visiting from China will undergo blood tests to confirm whether a man from Hiroshima Prefecture is his uncle, Health and Welfare Ministry officials said.

Zhang Wanchang, who is believed to be 58, met with the man and two of the man's relatives at the National Olympics Memorial Youth Center in Tokyo, the officials said Thursday.

Zhang and the Hiroshima man found they had some memories in common, including a recollection that Zhang's brother visited him in China before returning to Japan when Zhang was about 8.

"I was glad that he came to see me," Zhang said. "I believe he is my kin because he resembles me, but I'd like to confirm that with a blood test."

Zhang is one of four "war orphans" who arrived in Japan on Tuesday for a weeklong stay to locate long-lost relatives.

Another member of the group, Gu Tiefeng, aged around 58, is to take a blood test to confirm whether a Tokyo man she met Wednesday is her brother.

A third member of the group, Ma Fude, also around 58, took a blood test Wednesday to determine whether he is related to a woman from Mie Prefecture who thinks he could be her nephew.

It is expected to take about six months before the results of the blood tests are known.

Earlier in the day, the four, including Han Tonglai, around 60, visited a vocational school in Tokyo's Shinagawa Ward where Japanese returnees study.

Ma said he was eager to bring his sons to Japan with him, saying he believes they would easily adapt to life in Japan.

A large number of Japanese children were separated from their families in China in the chaos at the end of World War II. Many were raised by Chinese foster parents.