Persimmon tannin sake bag, stylish handmade fabric NO.3, cylindrical, one side 25X25cm + scraps 16X17cm Large repair mark 22X10cm Although they have become less common now, these were dyed with persimmon tannin to enhance the preservation of the sake bags needed in the sake brewing process at breweries. The subtle color variations due to the chemical reaction between persimmon tannin and alcohol, as well as the areas that have been repaired, give it a unique character.