In Memoriam: Kenzo Sato (1929-2026)

Below is the obituary for Kenzo Sato (1929-2026), who served as chief engineer for the Yale “Emperor” tandem van de Graff Accelerator (MP-1) at the Wright Nuclear Structure Laboratory (WNSL). Sato was hired in 1962 and retired from Yale in 1996. The text below was provided by Kenzo’s widow, Stephanie Arrell.

We are following the Japanese tradition of a 49-day mourning period for Kenzo Sato, 97, retired Yale nuclear physicist, who passed away due to complications of pneumonia with his wife at his side on July 12.  During this time, his widow, Stephanie Arrell, has been receiving and continues to receive visits by many friends, neighbors, colleagues, and the apartment maintenance crew, who have been bringing flowers (roses and star-gazer lilies sent from Japan), sweets, cards, and comforting words.  Kenzo was a sweet, generous, gentle man, who overcame many difficulties in his life.

At age 16, Kenzo survived the March 1945 bombing of Tokyo City with his parents by running through the streets, carrying futons over their heads.  Young Kenzo saved his precious drafting tools and a few books by burying them in the ground to be found later.  

Having obtained a Physics degree from The University of Tokyo in 1953 and an M.S. degree from The Institute of Science and Engineering at the University of Tokyo in 1955, Kenzo arrived in the U.S. in 1957 under the sponsorship of the Mitsubishi Atomic Power Industries and was admitted to Brookhaven National Laboratory where he spent two productive years of research in the reactor and neutron physics field.

From M.I.T. in 1961, he received his second M.S. Degree—this time in Nuclear Engineering.  In 1962, he was hired as Chief Engineer by D. Allan Bromley Ph.D., Director of the Yale Wright Nuclear Structure Lab. 

Comments from Prof. Bromley in a letter to Kenzo dated 1977: “Through your technical and management expertise, you put together a group of professional accelerator operators and maintenance engineers.” In the early 1980s, Kenzo was instrumental in the construction of the first particle accelerator capable of probing the nuclei of all known elements in the universe. 

Over the course of Kenzo’s career, he presented numerous papers at the Symposium of Northeastern Accelerator Personnel (SNEAP).  Kenzo also dealt with countless students who obtained their Ph.Ds. 

Throughout his life, Kenzo enjoyed classical music, New York theater, the Opera and fine dining.  A familiar sight in the neighborhood during his 70s and 80s, Kenzo rode his Bianchi bicycle to the top of East Rock Park and back practically every day regardless of the weather; later, concerned about street traffic, he rode the stationary bike diligently and was last counting his 1,000 “pedalings” at age 97!

Kenzo was preceded in death by his parents, Ichie and Yoshiko Sato and his beloved sister, Hiroko.  He will be greatly missed by colleagues, friends, many neighbors, in-laws, and his wife.  In lieu of flowers, gifts may be made to Diabetes and Metabolism | Yale School of Medicine or your favorite charity.  A celebration of Kenzo’s life will be held at a later time. Thanks to his caregivers, St. Raphael’s Vitas Home Hospice Program.