东京 (Dōngjīng) is the Chinese name for Tokyo, the capital city of Japan. Literally meaning 'Eastern Capital', the term reflects its historical role as the eastern counterpart to Kyoto — which was historically called 'Western Capital' (西京, Xījīng) during certain periods in Chinese and Japanese imperial naming conventions. While the characters 东 (dōng, 'east') and 京 (jīng, 'capital') are common in East Asian place names, 东京 specifically refers to Tokyo in modern usage across Chinese-speaking regions.

This word is used exclusively as a proper noun for the Japanese metropolis — never for other cities or metaphorical contexts. It appears in news reports, travel discussions, cultural references, and geopolitical contexts. Unlike some transliterated names, 东京 is a calque: it preserves the original Japanese meaning rather than phonetically approximating 'Tokyo'. Learners should note that it is always written without spaces and never pluralized or modified with aspect or tense markers, as it is a fixed geographical name.