Lifelines has received a number of inquiries from people eager to make contact with long-lost friends or family members in Japan, so we're putting them all together in this "In Search Of" special.

• First up, Sarah in the United Kingdom would like to make contact with any family members of her Japanese grandfather, Mamoru Chikane. He was married to Lydia, a British woman, and Sarah's father was one of their two sons.

From her research, Sarah knows that Mamoru was a sailor. It is thought he was born around 1896 in Japan and, according to his death certificate, he died in 1936 in England after a shipping accident. Her father was only two at the time and has barely any memories or knowledge of his Japanese relatives.