Kitanosho Castle

 was a "hirashiro" (castle located on flatland). Its remains are located in current-day Fukui, Fukui Prefecture, Japan. As the castle lasted merely eight years, few records survive about it. It is known, though that it was built by Shibata Katsuie in 1575. Also, it appears that the "tenshu" (keep) was nine stories high, making it the largest of the time.
The castle was destroyed by fire in 1583, after Katsuie killed his wife, Oichi, and then committed seppuku, following defeat in the Battle of Shizugatake. A few stone foundations of the castle were uncovered in archaeological digs and are now open to the public.