Masatsune Kainosho (1942–2025)—A personal remembrance

Masatsune Kainosho (Kai) was invited to contribute to this volume, but shortly before his death on December 28, 2025, he sent an apologetic email stating that he was too ill to comply. This is the type of contribution Kai might have written had the fates of the subject and narrator been interchanged. Kai and I were mutual scientific admirers, collaborators, and great friends for 49 years. Our wives had common interests in weaving and other crafts. We enjoyed visiting one another, traveling together, staying in each other's homes, and getting to know family members. We shared interests in the good things in life as well as life's milestones of marriage, birth, and death.