Nijiya Market has an entire wall of bento.
I’m not necessarily what you would call a bento connoisseur, but my goodness: it’s the finest collection I’ve ever seen in terms of quality, quantity, and variety. Earlier this week they sold me my first ever plum onigiri (delicious), coupled with old reliables Ramune and Hi-Chew after a long, leisurely browse of Japanese edibles. Highlights include an aisle dedicated to different kinds of cooking oil (genius, tbh) and more kids’ branding than you could shake a stick at. Most interesting: seaweed sheets cut out in Pokémon shapes. Don’t miss it! Japan Center, Post at Geary.
Protip: There are a handful of nonfood markets in Japantown, too: Daiso, where almost everything is $1.50, has a gorgeous variety of tableware, and Ichi Ban Kan, immediately upstairs, is best for imported toiletries. It’s also really hard to miss as far as restaurants go- our pick is Mifune, which I’ll cover after our next meal there.
If you’re not into eating bento, I strongly recommend checking out the anime Ben-to, a quirky little action comedy about brawling for the meals as soon as they hit half-price. Strangely themed, yes, but well written and surprisingly relatable- and, of course, accessible from your bed. Have fun!