Cultural Geography and Shared Heritage

Historians and cultural geographers often group China, Korea, Japan, and Vietnam under the label "Sinosphere" or "Sinic cultural sphere," a term describing the shared historical influence of Chinese civilization across these otherwise linguistically and ethnically distinct societies. The most visible marker of this shared heritage is the historical use of Chinese characters for writing: hanzi in China, kanji in Japan, hanja in Korea, and chữ Hán in Vietnam, all derived from the same logographic script even as the spoken languages themselves belong to entirely unrelated language families — Sinitic, Japonic, Koreanic, and Austroasiatic, respectively. Japan continues to use kanji alongside its native hiragana and katakana syllabaries, while Korea largely replaced hanja with the phonetic hangul script, developed under King Sejong the Great and promulgated in 1446, and Vietnam adopted the Latin-based quốc ngữ script under French colonial influence in the twentieth century.