一場科學與人文的相遇

湯川秀樹（1907－1981）誕生於東京。當量子力學於1920年代在歐洲成形之際，湯川逐漸確立對理論物理的興趣與方向。1935年，他提出「介子理論」，預測存在於原子核之間的中介粒子，用以解釋質子和中子（核子）之間的強相互作用。1947年，「π介子」在宇宙線中被發現，證實湯川的理論。湯川因此榮獲1949年諾貝爾物理學獎，成為日本首位獲獎的物理學家，對現代粒子物理學的發展具有奠基性的影響。
同時，粒子標準模型中以湯川命名的「Yukawa作用項」，是解析粒子質量起源的關鍵。湯川也創辦了英文期刊Progress of Theoretical Physics（《理論物理進展》），培育日本新一代物理學家，推動戰後的日本重返國際科學界。
另一方面，湯川生於學養深厚的家庭，自幼接受嚴謹的漢學教育，誦讀《論語》與《孟子》，學習書法，稍長涉獵《老子》、《莊子》和各國文學譯著，孕育出兼具科學理性與人文精神的特質。

Hideki Yukawa (1907–1981), born in Tokyo, was a towering figure in theoretical physics. In 1935, he proposed the meson theory, predicting a particle that mediates the "nuclear force" holding together the protons and neutrons inside the atomic nucleus. This groundbreaking work was experimentally confirmed in 1947, when Cecil Frank Powell discovered the π-meson in cosmic rays. In 1949, Yukawa became the first Japanese Nobel Laureate, a milestone that revitalized Japan's presence in the global scientific community.
His "Yukawa interaction" term is a fundamental pillar of the Standard Model, playing a fundamental role in explaining how fermions acquire mass. Yukawa also founded the English-language journal Progress of Theoretical Physics to cultivate a new generation of Japanese physicists, propelling postwar Japan's return to the international scientific community.
At the same time, raised in a family with a deep scholarly tradition, Yukawa was immersed in classical Chinese learning, Daoist philosophy, and world literature from a young age.

1935年，湯川秀樹發表論文，提出以一種新粒子的交換作用解釋核子間的作用力，並預言介子的存在。十二年後，π介子的發現為這項理論提供了關鍵實驗證據。介子理論不僅使湯川獲頒諾貝爾物理學獎，也為核力研究及戰後粒子物理學的發展奠定重要基礎。

In 1935, Hideki Yukawa published a paper proposing that the force between nucleons could be explained through the exchange of a new particle, whose existence he predicted as the meson. Twelve years later, the discovery of the pion provided crucial experimental evidence for the theory. The meson theory not only earned Yukawa the Nobel Prize in Physics but also laid an important foundation for research on nuclear forces and the development of postwar particle physics.

湯川秀樹成長於學術氣息濃厚的家庭。父親小川琢治為地質學家，長兄小川芳樹專攻冶金學，次兄貝塚茂樹則研究中國古代史。幼年時，他亦隨外祖父研習並背誦漢學經典。自然科學與傳統人文交織的成長環境，為他日後兼具科學探索、人文思考與社會關懷的生命歷程奠定了基礎。

Hideki Yukawa grew up in a family with a strong scholarly tradition. His father, Takuji Ogawa, was a geologist; his eldest brother, Yoshiki Ogawa, specialized in metallurgy, while his second-eldest brother, Shigeki Kaizuka, studied ancient Chinese history. As a child, Yukawa also studied and memorized the Chinese classics under the guidance of his maternal grandfather. This upbringing, in which the natural sciences and traditional humanities were closely intertwined, laid the foundation for a life marked by scientific inquiry, humanistic reflection, and concern for society.