noun
Heijō-kyō (ancient capital of Japan)
Historical term for the capital city during the Nara period (710–740 and 745–784), located in present-day Nara.
平城京は奈良時代の日本の首都でした。
Heijō-kyō was the capital of Japan during the Nara period.
Heian-kyō was the later capital (Kyoto) from 794, succeeding Heijō-kyō.
From 平城 (Heijō, an alternate name for Nara) + 京 (capital). The name reflects its role as the imperial capital during the Nara period.