Korea met ramen as a boxed product before it met the fresh dish. Instant noodles arrived from Japan in the 1960s, were renamed ramyeon, and did something in Korea they did nowhere else: they became a staple food rather than a snack, eaten at home, in convenience stores, at midnight and breakfast. By industry counts, Koreans sit among the heaviest instant-noodle eaters per head in the world, and the country's relationship with the noodle runs through the packet, the pot and the ladle in equal measure.

The instant republic

The shrine noodle is shin ramyeon, launched in the 1980s, a spicy chilli-flake broth that became the taste of the format, so much that the brand name doubles as the flavor. Korean instant culture built its own theatre around it: the folding of the packet with chopsticks, the egg cracked in late, the rice added to the leftover soup, the cheese slice laid on top by the sinful. None of this exists in the Japanese original. Korea took the product and wrote a cuisine around it.

Jjamppong, the fresh one

When Koreans eat fresh noodle soup in a shop, the bowl with the family resemblance is jjamppong, a spicy seafood noodle soup born in the Incheon Chinatown, the port where the Chinese community landed. Pork, squid, mussels and vegetables stir-fried with chilli oil into a red broth, wheat noodles through it, steam for days. It is the closest Korean cousin to a seafood ramen, and our Umi Jigoku, mussel, scallop, prawn and crab stick over the pork bone soup, is the same appetite with a Japanese accent. Order both in a week and you have eaten the same coastline twice.

The stew that borrowed the noodle

Korea also wrote the chapter on noodles joining stews. Budae jjigae, army stew, assembled after the war from spam, sausage and whatever the bases yielded, with ramyeon dropped in to finish it, and tteokbokki's spicier sibling rabokki does the same with rice cakes. The noodle is an ingredient in Korea's pot dishes in a way Japanese ramen would never permit, and that flexibility is the Korean signature: the noodle serves the dish, in Japan the noodle is the dish.

The shared spice

What Korea and a spicy ramen shop have in common is the belief that heat belongs in the bowl. Korean heat builds with gochugaru, the flaked chilli with sweetness in it, and our chilli ladder builds on a paste the founding suppliers complained burned their hands, but the customers arrive with the same training: raised on shin ramyeon, fluent in red soup, and looking for the next level up. The ladder here runs to sixteen. Korea sends us its climbers.

Jjajangmyeon, the other port noodle

The Incheon Chinatown produced a second dish that deserves its seat in the story. Jjajangmyeon, noodles under a black sauce of chunjang, the fermented soybean paste the Chinese cooks brought with them, with pork and onion, was invented for the Korean table and became, like jjamppong, a Chinatown child raised Korean. It is the country's delivery food, the dish of moving day and baseball broadcasts, and it shares with ramyeon the status of a borrowed noodle that outgrew its lender. The three of them, jjamppong, jjajangmyeon and ramyeon, are the ports of entry through which Korea ate the Chinese-Japanese noodle world, and every one of the three began within walking distance of the same harbour.