Tatsumaru returned later as a the Blue Dragon and assaulted several locations of the small country. But eventually killed himself as punishment for his crimes. The country of Gohda is small but makes up for it through a complex network of spies, skilled samurai, and the covert spies the Azuma Ninja. Due to the philosophy of the country's daimyo, and it's size it frequently finds itself at war with neighboring countries. But thanks to the unity this small country has it has survived and prospered in the face of these challenges.
Gohda castle (郷田城 Gōda-jō) appears to be structured after traditional japanese castles of that time. With multiple floors, and the daimyo's war room being at the top of the castle. At one point during the invasion of Tenrai. Rikimaru went somewhat underground in the castle to find Lord Gohda as enemy ninja stormed the castle. The castle has been attacked several times and rebuilt as a result of the numerous wars the country has been inolved in.