【說明】

內藤湖南，本名虎次郎，京都帝國大學文學部教授，是日本東洋史研究的奠基者之一，曾提出「文化中心移動說」與「唐宋變革論」。1908年，湯川秀樹之父小川琢治轉任京大文學部，因而和同在京大的內藤湖南建立深厚的交誼。秀樹雖未曾與內藤謀面，但父親與內藤的密切學術關係，使秀樹對內藤的學識與人格深抱敬意。當內藤聞悉秀樹立志從事物理研究時，曾予以高度讚許，此舉對秀樹頗具激勵作用。

「迥」為高遠，「合」為交會契合；「天機」多指天地運行之奧理，合觀後或可寓為超然境界，契合天地運行之意。古典詩文與畫論中亦見相近語彙，如唐人齊己（863-937）〈中春感興〉有「道合天機」之句；歷代論王維畫亦稱「絕跡天機」、「迥出天機」，以言其筆墨契合自然。

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​【Description】

Konan Naitō, whose given name was Torajirō, was a professor in the Faculty of Letters at Kyoto Imperial University and one of the founding figures of Japanese studies of East Asian history. He proposed theories such as the shifting of cultural centers and the transformation between the Tang and Song dynasties. In 1908, Hideki Yukawa’s father, Takuji Ogawa, transferred to Kyoto Imperial University, where he formed a close scholarly friendship with Naitō. Although Hideki never met Naitō in person, the deep academic bond between his father and Naitō fostered in him a lasting respect for Naitō’s scholarship and character. When Naitō learned of Hideki’s decision to pursue physics, he offered high praise, which proved a source of encouragement to the young Hideki.

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“Jiong” (迥) denotes loftiness or transcendence, while “he” (合) means convergence or alignment. “Tianji” (天機) commonly refers to the underlying principles governing the cosmos. Taken together, the phrase may be understood as the cyclical unfolding of all things in accordance with the workings of nature.
Comparable expressions appear in classical poetry and painting theory. In the Tang dynasty, the monk-poet Qi Ji (863-937) wrote “dao he tianji” (道合天機, “the Way accords with the cosmic principle”). Later art criticism on Wang Wei (699-761) described his paintings as “jueji tianji” (絕跡天機) and “jiongchu tianji” (迥出天機), suggesting that his brushwork achieves a state of naturalness beyond visible artifice.