If you were visiting Japan and wanted to experience the best of the country's dining scene, your itinerary might look something like this:
First up, some market-fresh fish, perhaps from a stall in Tsukiji or a seafood restaurant along the Shonan coast. Then a visit to a classic eatery in shitamachi (Tokyo's old downtown), such as sukiyaki spot Imahan, which has been in business in Asakusa since 1895. To sample some popular niche foods, you might try tonkatsu (pork cutlets) at a branch of the Maisen chain or eel slathered with savory sauce at Tokyo's well-regarded Miyagawa. Lunch at a donburi (rice-bowl) spot would offer a taste of down-home dining, and you'd probably want to enjoy handmade noodles, like the udon at classy Ginza restaurant Saganobori. If you had any time and appetite left, you could experience a Japanese take on notable foreign cuisines — Korean, Chinese, Italian.
Or, instead of all that, you could just visit the Foursyun food court at the LaLaport Yokohama shopping mall.