The climate in Japan is very different than in Denmark. The humidity in Japan is high and that is an advantage for Japanese kitchen utensils. Many Japanese kitchen utensils are made of wood because wood has a positive effect on food.
Wood is an organic material and is influenced by the climate. The high air humidity in Japan has a positive effect on wooden tools in a way so they do not dry out quickly and thereby crack.
You can meet that by regularly moisture the kitchen utensils.
At Sushi course for beginners I will talk more about how to maintain your bamboo mat.
Zoë has lectured and held sushi courses for A. P. Moller – Maersk, Hugo Boss Nordic, Novo Nordisk, Novartis, Velux, Gorrissen Federspiel, Beierholm revision, Elbek & Vejrup and many more.