This paper examines the calligraphy of Fujitsuka Chikashi(藤塚鄰). Approximately 86% of the sources are Chinese, with a small number of Korean and Japanese materials. The most frequent subject matter, accounting for 33%, concerns Confucius's teachings and philosophy from The Analects, The Doctrine of the Mean, and Mencius, indicating that Confucian thought formed the foundation of his ideology. Fujitsuka also inscribed and presented admonitions such as "virtues of a gentleman," "diligence," and "humility," tailored to the recipient. For his students aspiring to become scholars, he gifted calligraphy that encouraged an empirical research attitude. Meanwhile, although limited, the Korean sources reflect the outcomes of Fujitsuka's research on "East Asian Cultural Exchange" during his tenure at Kyōjō Imperial University, revealing an open worldview. On the other hand, “The Supreme Foundation of Imperial Protection(極天護皇基),” derived from Japanese poetry, expresses loyalty and sincerity towards the Emperor, reflecting the era's sentiment as a scholar of Chinese classics. The three aspects underlying Ritsujin Fujitsuka's ideological background—universal knowledge and empirical spirit from Chinese classics, respect for cross-border Asian culture from Korean sources, and public loyalty in Japan—are confirmed to harmonize without contradiction as a scholar of Chinese classics who espoused the unity of knowledge and action, thereby shaping the individual that is Fujitsuka.