Ekiben (bento sold at train stations) and Soraben (bento sold at airports) often use local ingredient and tend to be more hand made rather than mass produced by machine, where bento sold at Konbini (convenience stores) are often more generic and mass produced at a company central facility. I do make use out of Depachika (デパ地下, department basement food courts) and also Depachika is my go to place if I want to get a nice confectionary/snack/sweet gift to somebody.

On business trip Ekiben became common for a meal. Before getting on Shinkansen at Tokyo or Shinagawa grab Ekiben at a station, have early/late lunch on Shinkansen and go to the business meet, not to waste time for meal that way. Also, quick 5 min. lunch at a train station stand up noodle shop (立ち食いそば、うどん) also is pretty common while out on business. My Japanese coworkers are pretty much same way.

I don't go to fancy places like most FTers do. I am more of B-Kyu Groumet (B級グルメ) type of a guy.