These shaved dried bonito flakes are made especially for making soup stock. The thickness of the shaved dried bonito flakes is about 0.6 to 0.9 mm, and by leaving them for a long time (40 to 50 minutes), you can make a rich soup stock. The container is filled with inert gas to ensure that the fresh flavor of the freshly shaved bonito flakes lasts a long time. Product contents: Bonito flakes (domestic). Instructions: Store away from direct sunlight and in a cool, dry place.