Bento is a Japanese-style packed lunch.(弁当(べんとう)は日本の昼食のスタイルの一つです。)
I think that bento is really popular with Japanese businessmen who want to save money and have lunch early. (弁当は特にお金を節約したいとか、早くお昼をすませたい日本のビジネスマンに人気があります。)
Also you can buy a bento in convenience stores where so many bentos are sold. (コンビニエンスストアには、たくさんの種類の弁当が売られており、そこで買うことができます。)
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