| Ariwara clan 在原氏 | |
|---|---|
| Parent house | Imperial family |
| Founding year | Kōnin (810-824) |
The Ariwara clan (在原氏, Ariwara-uji; also known as the Arihara clan) was a Japanese noble family of imperial descent.
The name of the clan can also be read in Arihara.
The clan was initially formed during the Kōnin era (810–824) in the reign of Emperor Saga when the two sons of former Imperial Prince Takaoka (廃太子高岳親王, hai-taishi Takaoka-shinnō), Yoshifuchi and Yasusada, were granted the name "Ariwara." In 826, following a request by Takaoka's brother Prince Abo (阿保親王, Abo-shinnō), the latter's sons Yukihira, Narihira, Morihira (守平) and Nakahira (仲平) were also given this name. The descendants of Narihira, a great waka poet, continued to flourish. However, the clan remained politically obscure due to pressure from the powerful Fujiwara clan.