Dr. Samuel S. Koide, who was a summer researcher for more than 20 years at the Marine Biological Laboratory in Woods Hole, died April 2 at his Dobbs Ferry, New York, home. He was 97.

He was the husband of Dr. Sumi Mitsudo Koide, who preceded him in death by six weeks. They were married for 61 years.

Known as Sab, he was born in Honolulu, Hawaii, the fourth of 13 children of Sukeichi and Hideko Koide.

A graduate of the University of Hawaii in 1945, he would later be honored with a Distinguished Graduate Award in 1996 and the Distinguished Alumni Award in 2006. Dr. Koide received his master’s degree, MD and PhD from Northwestern University. He was on the medical staff at Northwestern University Hospital in Chicago and the Memorial Hospital in New York.

Dr. Koide retired as senior scientist of biomedical research at the Population Council, where he also served as assistant director in 2003 after 38 years on staff.

He held faculty positions at the Sloan Kettering Institute for Cancer Research, the Rockefeller University and Cornell Medical School. He published more than 300 peer-reviewed studies primarily in the field of reproductive biology and mentored dozens of postdoctoral fellows.

He began an endurance sports career at the age of 52. In triathlon, he was an Honorable All American in 1989 for his age group. In running he twice won the NYC Marathon for his age group. He was also named the 2004 Male Runner of the Year by the Millrose Athletic Association and the 2005 Runner of the Year age group by the New York Road Runner’s Club.

As a veteran of World War II, he trained in the Military Intelligence Service Language School of the US Army. He served in the Philippines and in Occupied Japan, achieving the rank of first lieutenant. He witnessed the Japanese attack on the island of Oahu on December 6, 1941; 60 years later Dr. Koide also would view the terrorist attack on Manhattan on September 11, 2001.

He leaves his sons, Mark Koide of Mendham, New Jersey, and Eric Koide of Los Gatos, California; seven grandchildren; and three brothers and a sister, all of Honolulu.

In addition to his wife, he was predeceased by his daughter, Sumi Lynn Koide.

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