Photography was not allowed inside the palace, however here is the floor plan. Every one of the rooms in the castle has a formal name, but I’ll only address a few of the important ones here.
1) The Yanaginoma (Willow Room) and, above it, the Wakamatsunoma (Young Pine Room). These rooms were used by inspectors to verify the identities of visiting feudal lords.
2) These three rooms are called Ichinoma, Ninoma and Sannoma (literally First, Second and Third room) and were used as waiting rooms for the visiting feudal lords.
3) The Chokushinoma chamber was the waiting area for the Imperial Messenger prior to his meetings with the shogun.
4) The Shikidai reception room was where visiting feudal lords would offer their greetings and gifts to the councilors stationed here.
5) The Ichinoma and Ninoma form the First and Second Grand Chambers in the Ohiroma building where the shogun would hold public meetings with the feudal lords.
6) The Yarinoma (Spear Room) allowed storage of weapons and where warriors could be hidden in case they were needed to protect the shogun as he hosted the public meetings.
7) The Kuro-shoin (Inner Audience Chamber) is a smaller version of the Ohiroma and was used by the shogun to host private meetings
8) And finally, the inner-most Shiro-shoin was the shogun’s private study and bedroom.