Kyushu Ramen — Tonkotsu Origin and Variations

Ingredients

• For the tonkotsu broth
• 1.5 kg pork bones (trotters and neck), blanched and rinsed before use
• 3 litres cold water
• For the tare (seasoning base)
• 100 ml soy sauce
• 20 g salt
• For the noodles
• 400 g thin straight ramen noodles, Hakata-style; thin and firm
• For the toppings
• 4 slices chashu (braised pork belly), sliced
• 60 g menma (seasoned bamboo shoots)
• 2 spring onions (negi), finely sliced
• 40 g pickled red ginger (beni shoga), drained

Method

1. 1
   Place the pork bones in a large pot, cover with cold water, and bring to a rapid boil. Drain, discard the blanching water, and rinse each bone under cold running water to remove impurities. Return the cleaned bones to the pot and cover with 3 litres of fresh cold water. The bones should be clean and pale before proceeding.
2. 2
   Bring the pot to a vigorous, rolling boil over high heat. Maintain this aggressive boil — not a gentle simmer — for a minimum of 12 hours, and ideally 18 to 24 hours, adding water as needed to keep the bones submerged. This is where the dish lives or dies: the rolling boil is mandatory to force collagen from the bones into emulsification, producing the characteristic creamy-opaque white broth. A mere simmer will yield a clear stock and the dish cannot recover from it.
3. 3
   After the full boiling period, assess the broth: it must be opaque white and viscous enough to coat a spoon or the back of a finger. If it remains translucent or thin, continue boiling. Only when the broth is cloudy and coating is it ready. Strain through a fine sieve, pressing lightly on the solids, and discard the bones.
4. 4
   Season the strained broth with tare — soy sauce and salt — adjusting to a deep, intensely savoury flavour. The broth should be powerful and concentrated; it will be partially diluted by the noodles and absorbed by them during eating. Keep the seasoned broth at a steady simmer while preparing the noodles.
5. 5
   Bring a separate large pot of unsalted water to a full boil. Cook the thin, straight Hakata-style noodles briefly — they must remain firm (kata), close to al dente. Drain immediately and divide among four warmed bowls. The noodles should be springy and resist the bite; softness at this stage cannot be corrected.
6. 6
   Ladle the hot tonkotsu broth generously over the noodles in each bowl. Lay one slice of chashu across the noodles, add a portion of menma and a pinch of sliced negi. Place a small mound of pickled red ginger to one side. Toppings are minimal by design — the broth is the centrepiece. Serve immediately.