We use the Jumbo Ferry from Kobe to Shodoshima on those days when we visit the island. Nobody seems to like the cool fresh air outside on a lovely day. I certainly don't mind.
I have been teaching English as a second language for over 20 years in Japan and Canada. What keeps me in Japan is the love of its culture, which constantly surprises me. I am also fascinated with "alternative travel", or "travel off the beaten path". Ferries and trains are my mode of choice... airplane for convenience.