How to Make authentic Japanese teuchi udon noodles at home

In this tutorial, learn how to make a classic Asian dish, Teuchi Udon. These tasty noodles make the perfect side dish or dinner and go great with many other Asian speciaties.
You WIll Need:
(serves 3~4)
*300g Udonko - Wheat Flour w/ protein content 9.0~9.5% (10.6oz)
*15g Salt (0.529oz)
*130ml Water (4.40 fl oz)
*50g Corn Starch or Potato Starch (1.76oz)
*Mentsuyu - Noodle Soup

- Seasonings -
*Spring Onions
*Grated Ginger
*Grated White Sesame Seeds

- Cooking Items -
*Ziploc (27x27cm / 10x10 inch)
*Pastry Board (46x53cm / 18x21 inch)
*Rolling Pin (46cm Ø 3cm / 18 inch Ø 1.18 inch)

Note: It was 75°F (24°C) on the day of shooting and the fermentation time depends on the temperature. To get the rough idea for fermentation time, rest the dough in a plastic bag for 2 hours in spring and fall, 30 to 60 minutes in summer and over 3 or 4 hours in winter.