Soki Soba (Okinawan Noodles with Spare Ribs)

*12 cups /2400ml water
*15cm long konbu kelp
*20g dried bonito flakes
*1/4 cup /100ml sake
*2 tsp salt

*4 pack Okinawan noodles
*red pickled ginger
*chopped spring onion

[ingredients for spare ribs]
*800g pork spare ribs
*1/2 cup mirin sweet cooking sake
*1/2 cup /50ml sake
*3 tbsp soy sauce

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