Nikaidō Teruyuki

二階堂照行

Nikaidō Clan

Sengoku Daimyō

Mutsu Province

Lifespan:  Unknown to 9/18 of Eiroku 7 (1564)

Other Names:  Yukihide

Rank:  bushō, sengoku daimyō

Title:  Senior Assistant for Police and Security, Governor of Shinano

Clan:  Sukagawa-Nikaidō

Bakufu:  Muromachi

Father:  Nikaidō Haruyuki

Siblings:  Teruyuki, Yokota Yoshinobu

Wife:  Daughter of Date Tanemune

Children:  Moriyoshi, Ōkubo Sukechika

Nikaidō Teruyuki served as a bushō and sengoku daimyō during the Sengoku period.  He was the sixth head of the Sukagawa-Nikaidō clan of Mutsu Province.

Teruyuki was born as the lineal heir of Nikaidō Haruyuki, a sengoku daimyō and the fifth head of the Sakugawa-Nikaidō.

Based at Sukagawa Castle, he governed the Iwase District of Mutsu.

Teruyuki was the son-in-law of Date Tanemune.  From 1542 to 1548, the Date clan was beset by a succession struggle between Tanemune and his lineal heir, Date Harumune, known as the Tenbun Conflict.  During this event, Teruyuki sided with Tanemune.  In the era of Teruyuki, the Nikaidō governed only about fifty townships, showing signs of decline.  In 1559, the Nikaidō lost Imaizumi Castle to the Tamura clan.  Thereafter, Teruyuki made numerous attempts to recapture the site, but was unsuccessful. 

In 1564, he died and was succeeded by his lineal heir, Nikaidō Moriyoshi.