Asakawa's wife Miriam was born in 1879 (exact date unknown) in
New Haven, Connecticut, to father David R. Dingwall and mother Catherine Cameron Dingwall. Her parents were Scottish immigrants who set out for the United States after their marriage. Miriam's occupation was a
seamstress. She met Asakawa when he was a doctoral student at Yale University after graduating from Dartmouth College in 1899 with a Bachelor of Letters degree. When Asakawa received a Ph.D. degree in 1902 and was an instructor at Dartmouth College, the two married on October 12, 1905, at a church in Crown Point,
Essex County, New York, and became a formal couple under church law. According to reports at the time, the marriage was "a very happy one," but Miriam died on February 4, 1913, and was buried in the Dingwall family graveyard at Evergreen Cemetery in New Haven, Connecticut, owned by Miriam's family. Subsequently, Asakawa never remarried and remained single; they had no children. ==Selected works==