After leaving Matsuyama (more on that later), I rode a local train to Okayama where I could catch a Shinkansen to Tokyo. It's still an early rainy morning and few people are on board. As I recall, I had a bento box, boxed lunch, on the train from Matsuyama. People are always eating on the Shinkansen. I noticed some people bring food they have prepared but most buy bento boxes at the stations.
I'm sitting in the last row of seats in the car in the direction of travel. I reserved a seat there because there is enough room to stow your luggage behind that row of seats. Luckily, this train went all the way from Okayama to Tokyo.