"EKI-BEN" Station Bento
Eki-ben are special bento boxes sold on trains or at train stations designated for a long train trip. There are many different types of eki-bens you can choose from, and you can enjoy them while relaxing on the comfortable bullet train seats.
Gyutan Bento from Sendai. Gyutan Ekiben is popular not only for its tasty gyutan, but also for the self-heating technique. You can pull the string attached to the bento box which starts the chemical reaction and heats up the meal. No microwave is needed, and it is friendly for those who are not used to eating cold/room-temperature meals.