www.youtube.com 1000cc water 1 kombu 50g tempura powder 80cc soda ◆1000cc water ◆１kombu 40g katsuobushi ◆Dashi : soup stock 50cc mirin 50cc shirodashi 50cc soy sauce ◆tempura skin 150g oyster soba soup 60g longleek 280g soba mitsuba ↑Yout…