Nanokaichi Jin'ya

To get here, get off the train at the Joshu-Nanokaichi Station and walk just a few blocks. There isn't a lot to see, but it was worth the stop.  

Here is what the JCastle website says about it:

Nanokaichi-jin'ya was the centre of the small fief in Kanraku County established by Maeda Toshitaka, the fifth son of Maeda Toshiie, in 1616. The domain was worth 10,000 koku and was awarded to Maeda Toshitaka for his meritorious service at the Siege of Ôsaka, and his descendents ruled the domain over twelve generations for the rest of its existence (until 1871). In 1664 the fiefdom was valued at 12,036 koku, and by 1684 this had risen to 13,135 koku, presumably owing to the development of the land rather than any territorial expansion. Nanokaichi-jin'ya served the domain rather than a castle because of its small size and because of its financial dependency upon the Maeda Clan of Kaga Domain. 

In the 1830s Nanokaichi Domain was ravaged by the Tenpō Famines. In 1842 Nanokaichi-jin'ya was gutted by a large fire and the main residence had to be rebuilt; the surviving portion of the goten dates to 1843. It was around this time that the domain also established its Hankō ('Samurai School'), called Seikikan (成器館). After the Boshin War, in which Nanokaichi Domain participated on the side of the Restorationists during the Aizu Campaign, Seikikan was redesignated as the domain's Bunbu Gakkō (School of Literary and Military Science). The Bunbu Gakkō, and the fact that the jin'ya reverted to government control in 1871, is probably why the jin'ya site became Tomioka High School in 1897.