Japan Castle Atlas

Amano Yasukage

天野康景

A retainer who served Tokugawa Ieyasu from boyhood. After the Battle of Sekigahara he became lord of Kokokuji Castle in 1601 with a domain of 10,000 koku.

Years: 1537–1613

Historical record

Story

In 1607, after his retainers killed or wounded farmers from shogunate land, Yasukage shielded his men, abandoned the castle and fled. His domain was abolished and the castle shut down.

Connected castles

A level enclosure seen from the top of a high earthen bank, with the town spreading beyond (September 2017).

In-depth article

Numazu, Shizuoka

Kōkokuji Castle

興国寺城

The castle where Hojo Soun launched his rise went on to change hands among more than 16 lords and commanders in 120 years on a contested border.

Next 100 Fine Castles No. 148CastleHilltop

YaritsusozaiCC BY-SA 4.0Wikimedia Commons

last lordRecord source: article

Sources

1
興国寺城跡(沼津市)Checked: 2026-10-03
2
興国寺城跡ガイドブック(沼津市教育委員会)Checked: 2026-10-03
3
天野康景(補助資料・Wikipedia日本語版)Checked: 2026-10-03