A marbled slice of tonkotsu pork rests on a bed of yellow noodles, nestled next to three shiny green sheets of nori, some boiled spinach, and a few shreds of kikurage, or wood-ear mushroom. A pair of disposable chopsticks raises a tangle of noodles above the red bowl, as if headed to a waiting mouth just off the edge of the page. A description of the meal is printed next to the drawing, along with the price, date, and source: Family Mart, a Japanese convenience store. Itsuo Kobayashi draws what…