Ehime was formerly known as Iyo (伊予).
Take a bus from Matsuyama
Matsuyama Castle（松山城）- Situated on the 130m tall Katsuyama Hill in the center of the city, this sprawling fortress is one of three multi-wing, flat hilltop castles remaining in Japan. It was constructed by the feudal lord Katō Yoshiaki (加藤嘉明) over the course of 25 years, completed in 1627. Four of its eight strategic gates are designated national cultural treasures, and with the wealth of historical artifacts within its majestic walls — swords and armor belonging to the three occupying families, calligraphy and official documents from the feudal era (English available) — Matsuyama-jō is well worth the hike. The castle is accessible by hiking a wooded trail, but the ropeway (¥500 roundtrip) can be boarded at the east entrance. ¥500 adults, ¥150 children.