Soba in dashi

1000 water
10 Kombu 
25 Katsuobushi - tuna flakes
Shiitake
Niboshi/iriko

200 soba noodles

for 250 ml of dashi :
60 soy sauce
2 spoons of mirin
5 grated ginger

spring onion
dried seaweed

Yuzu kosho / wasabi

heat water with kombu, before boiling, remove and add Katsuobushi 
rest 3-5 minutes, drain dashi.