Saruhashi became the first woman to receive the Miyake Prize for geochemistry, named after her mentor Yasuo Miyake.
In 1985, Katsuko Saruhashi became the first woman to receive the Miyake Prize for geochemistry, a prestigious award named in honor of her own mentor, the eminent geochemist Yasuo Miyake, under whom she had trained early in her career at the Meteorological Research Institute.
The award recognized her decades of pioneering contributions to the field, including her development of Saruhashi's Table for calculating carbonic acid equilibrium in seawater and her groundbreaking research tracing radioactive fallout across the Pacific Ocean following nuclear weapons tests.
Winning this prize was particularly meaningful given its namesake — Miyake had been an early supporter of Saruhashi's scientific ambitions at a time when few mentors were willing to invest in the training of women researchers. Her receipt of the award named after him symbolized both a personal and professional full-circle moment, honoring the mentorship relationship that had helped launch her career.
As the first woman honored with this prize, Saruhashi once again broke through a barrier in a field of geochemistry that had, throughout her lifetime, remained dominated by men at its highest levels of recognition. This achievement further cemented her stature as one of Japan's most distinguished and honored scientists, and it reinforced the broader message she had championed throughout her life: that women could achieve the very highest levels of scientific excellence and formal recognition when given the opportunity.