Niwa Shita no Kage Toshi

The Garden Under Shadow City is one of the holdings of the Daidoji family and guards against the Crab to the south. (Crane p. 41)

Library
The library contained beneath the city is the single most complete collection of information on tactics outside the Akodo school. It is rumored that the Daidoji emply spies within the Akodo who copy imprtant texts and smuggle them out. The rarest book within the library was the pride of Daidoji Daimyo Daidoji Uji, and was a text devoted solely on gaijin strategy and swordplay, written by an ancient Daidoji Daimyo. No other library in Rokugan contains as many works on gaijin. (Crane p. 41)