Izu Oshima's food scene is inseparable from the sea that surrounds it. The island sits at the confluence of the Kuroshio Current, which pushes an extraordinary parade of fish through these waters year-round. Sashimi platters here arrive with a casual confidence you rarely find on the mainland — sliced thick, deeply flavored, almost shockingly fresh. Don't leave without trying kinmedai, the gorgeous alfonsino snapper that turns up at nearly every restaurant, often simply grilled with salt or simmered in a sweet soy braise.

Beyond the ocean's bounty, Oshima has a proudly volcanic pantry. The island's rich black soil nurtures camellia trees, and tsubaki oil — cold-pressed from camellia seeds — perfumes the local kitchen in ways you won't encounter elsewhere. Look for it drizzled over salads or used to finish a bowl of salt ramen, the island's beloved noodle specialty. Vendors near the port and at the Saturday morning market sell handmade pickles, dried seafood, and little jars of tsubaki oil that make perfect edible souvenirs.

For a proper sit-down meal, the family-run izakayas clustered around Motocho and along the road toward Ura-Shima are where locals actually eat. Pull up a stool at a counter, order a cold Oshima Island Beer, and let the chef guide you through whatever came off the boat that morning. If you're lucky enough to visit during late winter, try akasatomi — a hearty miso soup thick with local shellfish and foraged mountain vegetables that tastes like the island distilled into a single bowl.