Budget
Eco DÅgo
Almost on top of DÅgo Onsen, with free Internet. Check in is at 2PM, but you can leave your things there at any time.
Guest House Matsuyama
Run by the super friendly Tamanoi-san of The Sophia Club NPO. It has a number of different rooms both Western and Japanese style some of which are self-catering. All have private bathrooms. Tamanoi-san speaks good English and knows 'everyone' in town. Internet, bike use included.
Matsuyama Youth Hostel
Run by an eccentric but affable couple who will, among other things, provide courses on spoon-bending and scan your aura on demand. Expensive for what you get. A bit of a hike up a hill from the main part of town. Small, family kitchen not great for cooking, but situated near many restaurants.
Midrange
Hotel Taihei
Located just behind the castle, this hotel offers an observatory, open-air sauna and onsen 10th floor and two buffet style restaurants. It also has Internet access.
Matsuyama City Hotel
Also in the heart of Matsuyama, this smaller hotel has a cheaper breakfast, Japanese and Western restaurants, and a fitness room.
Funaya
Top-end classic ryokan, with indoor and outdoor onsen, centered around an exquisite traditional Japanese garden.