The fig sando is an autumn fruit sando, and the season is half its meaning. It is fresh fig and whipped cream between soft crustless bread, one of the fruit sando family, but figs are a short-window fruit in Japan and a fig sando appears when figs do, which makes it read as a seasonal treat rather than a fixture. What defines it is the fig itself: a ripe fig is soft, honeyed, faintly floral, with a seedy interior whose cut face is the entire visual appeal of the sandwich. The fig, the cream, and the bread need each other in a narrow balance, because a fig has little acidity to cut the cream and the cream has to be restrained enough not to bury a flavor that is gentle to begin with.
The craft is about ripeness and the cut. The fig has to be ripe enough to be perfumed and tender but firm enough to slice cleanly, and it is usually halved or set whole along the bread so a clean cross section reveals the rosy seeded interior at the center of the cream. The cream is lightly whipped and only lightly sweetened, often a fresh-dairy-leaning blend rather than a stiff stabilized foam, so it carries the fig instead of competing with it; a thin underlayer of cream against the bread also seals the crumb from the fig's moisture. The shokupan is soft, fine-crumbed, and crustless, spread to the edges so there is no dry corner and no gap behind the fruit. A good one tastes of honeyed fig and clean dairy and shows a centered, intact fig face when cut. A poor one uses an underripe fig that eats grassy and firm, oversweetens the cream until the fig disappears, or lets juice bleed pink into the bread, the failures a delicate seasonal fruit punishes hardest.
The variations stay close to the fruit. A drizzle of honey or a whisper of mascarpone in the cream deepens it without masking the fig; a black-fig versus green-fig choice shifts color and sweetness; the sandwich also turns up at the depachika fruit counter held to a higher cut-and-grade standard, a more exacting reading of the same idea. Each of those deserves its own article rather than being crowded in here.