Binchà Â-tan (, ), also called white charcoal or binchà Â-zumi, is a type of high-quality charcoal traditionally used in Japanese cooking. Its use dates back to the Edo period when during the Genroku era, a craftsman named Bichà «-ya Chà Âzaemon () began to produce it in Tanabe, Wakayama. The typical raw material used to make binchà Â-tan in Japan is oak, specifically ubame oak, now the official tree of Wakayama Prefecture. Wakayama continues to be a major producer of high-quality charcoal, with the town of Minabe, Wakayama, producing more binchà Â-tan than any other town in Japan. Binchà Â-tan produced in Wakayama is referred to as , Kishà « being the old name of Wakayama.
White charcoal is made by pyrolysing wood in a kiln at approximately for 120 hours, then raising the temperature to around . Once carbonised, the material is taken out and covered to cure in a damp mixture of earth, sand, and ash.
Binchà Â-tan is a type of hardwood charcoal which takes the natural shape of the wood that was used to make it. It is also harder than black charcoal, ringing with a metallic sound when struck. Due to its physical structure, binchà Â-tan takes on a whiter or even metallic appearance. Apart from being used for cooking, it has other benefits, such as absorption of odors.
Kishà « Binchà Â-tan is the charcoal from which Binchà Â-tan originated, produced in Wakayama Prefecture, Japan, particularly in the central region, including Hidakagawa Town. To preserve its quality and traditional production methods, Wakayama Prefecture designated the techniques for producing Kishà « Binchà Â-tan as an intangible folk cultural property on April 9, 1974.
However, as the definition of binchà Â-tan broadened and lower-quality or counterfeit products became more common, charcoal produced in Wakayama began to be specifically called Kishà « Binchà Â-tan to distinguish it and maintain its quality and tradition. On October 27, 2006, Kishà « Binchà Â-tan became the first regional brand certified under Japan's Regional Collective Trademark system.
The raw material used is typically ubame oak (Quercus phillyraeoides), and the charcoal is known for its hardness and metallic ringing sound when struck. Wakayama continues to be a major producer of high-quality binchà Â-tan, which is highly regarded both domestically and internationally. Although charcoal is generally classified as hazardous and its transport or carriage on aircraft is restricted, Kishà « Binchà Â-tan bearing the yellow âÂÂKishà « Binchà Â-tanâ label issued by the Wakayama Prefectural Charcoal Cooperative and marked âÂÂNON-DANGEROUS GOODSâ is exceptionally allowed for air transport. Japan Airlines permits the carriage of such certified Kishà « Binchà Â-tan on domestic flights, while the policies of other airlines remain unclear. This label also serves as a certification of the productâÂÂs authenticity.