Translation of "Heian" in Japanese

It is not known when the Hinamatsuri first started, but the Nagashibina, in its most primitive form, was already being celebrated during the Heian period.

ひな祭りがいつ頃からある祭りなのか、はっきりとはしていないが、平安時代にはすでに流しびなの原形があったようだ。

During the Heian period's initial stages, the imperial court completely devoted itself to imitating Chinese culture, however during the midst of the period, a culture based off of Japanese sense of beauty began to bloom.

宮廷では、平安初期には中国文化の模倣一辺倒でしたが、平安中期には日本的な美意識に基づいた文化が花開きました。