Most of the days' sights were centered near Matsuyama Castle.
Ninomaru Shiseki Tei-en is on the castle grounds.
The Ehime prefectural building.
Saka no Unenokuno Museum.
The Juzo Itami Museum. Itami made some great films as a director and was also a gifted actor. Currently I am reading a book based on him by his brother-in-law Nobel Prize Literature Award winner Kenzaburo Oe, The Changeling.
My two favorite Itami directed films, that I've seen so far (not all of them have English subtitles).