Shumai is a staple of my “skate bento” boxes. On cold days, put them in an insulated container. “Yummy!” You can see the smile of a loved one behind the rising steam. A frying pan and a ...

The most popular ekiben is undoubtedly Yokohama-based Kiyoken Co.’s “shumai” bento, which marks its 70th anniversary this year. According to company officials, about 27,000 shumai bento are ...