Etymology and distribution of 上原子.

Kamiharako 【上原子】^{レベル4
About 600}  The Japanese surnames etymology dictionary.

Niigata-ken Tookamachi-shi . Distribution including killer. A variant of 吉良 . Iwate-ken In Morioka-shi , tell him that he was renamed to disguise Kira's last name near Niigata-ken Kashiwazaki-shi . Estimated in the Warring States Period. It was in Niigata-ken Tookamachi-shi during the Edo period. 吉良 Kira reference.