Kaiu Kabe

Originally it was a wall built by Hida on the behest of Hantei. It ran along the southern Hiruma border until it was destroyed by the army of The Maw before the Battle of the Cresting Wave.

Given time by Kuni Osaku a new structure was built in 73 days running along the Saigo River in 716.

It has since been modified repeatedly over the years until it stretched from Razor of the Dawn Castle to the beginning of the Kuni Wastes.

The Carpenter Wall is over 100 feet tall with its foundations sinking many 100 feet into the soil. It is almost 30 feet wide and is held by 150'000 samurai with enough rice to feed an entire army fro 2 years. It has strong points located at 50 yard intervals, which house siege engines. Each strong point houses one crew for the engine and a further two regiments of troops of 50-100 bushi. Between the strong points even more archers and bushi are posted.

Communications along the wall are Hiruma runners who will sprint a mile before handing their message over to an other runner. The system is surprisingly effective and the runners are known as the "Winged Falcons".

Under the wall the Kaiu have constructed a maze of traps and dead ends. All Hiruma Scouts who are about to enter the Shadowlands are provided with a Kaiu guide to lead them trough the mazes.

(Crab p. 96-97)