Down a tiny alley, next to a surfboard-rental shop, you'll find cubby-sized cafe called Iyasume Musubi. With off-the-path charm, they serve bento boxes, rice bowls, and a wide menu of musubi (including the infamous Spam) for under $10. Don't wait for one of their few tables, take your order to go and eat just a few blocks away at the beach.
We tried a bento box with mackerel, a beef rice bowl, and several kinds of musubi, all for an unbelievable $11. They even serve breakfast like Spam, bacon, egg, and cheese musubi. Waikiki is expensive, but that doesn't mean you can't find some good deals on cheap, tasty eats.