Hokkaido bread: Start by dissolving the yeast in milk. Mix all the ingredients and knead for 20–25 minutes. If using a stand mixer, knead for 4 minutes on the lowest speed and 10–12 minutes on medium speed.
Place the prepared dough in a warm spot and let it rise for 1.5 hours.
Before kneading the dough again, sprinkle flour on your work surface. Knead the dough and divide it into six equal parts. Shape each part into a ball and cover with plastic wrap, letting them rest for 20 minutes.
Roll each dough ball into a length that matches your baking pan and roll them into logs. Grease the pan with butter and place the logs seam-side down, or line the pan with parchment paper. Let the dough rise for 1.5–2 hours.
Once risen, brush the dough with a mixture of egg and milk.
Prepare the Kamado BONO grill for indirect cooking, light the charcoal with a fire starter, place the grates and a baking stone, and wait until the temperature reaches 175°C.
Partially close the top and bottom air vents to maintain a consistent temperature.