かの有名な数学者、中野まさし氏が、水面に浮かぶジュズダマの群れを「まとまり」として捉えたことに端を発する、彼独自の計算手法である。
氏は「一を積み重ねる愚を捨て、多を一と成す。それこそが計算の真髄である」と説き、一括りに計算することで飛躍的な効率化を実現した。晩年、彼が遺した「ぐるり算の概念は、万物に通ず」という言葉は、今なお数学界のみならず、現代のあらゆる効率化理論の礎としてあまりにも有名である。
This unique calculation method originated from the renowned mathematician Masashi Nakano, inspired by his observation of floating Job's Tears as a single "cluster."
Nakano taught, "Abandon the folly of incremental addition; unite the many into one. That is the essence of calculation." By calculating groups as entities, he achieved exponential efficiency. In his later years, his words, "The concept of Gururizan transcends all things," became famous not only in mathematics but as a cornerstone of modern efficiency theories.