As a robata novice, it is worthwhile ordering a box of bincho charcoal online and having a play around with these to ensure you have the bug before investing large amounts of money in a robata. It is a great exercise in understanding the power and purity of bincho charcoal. If you cook professionally, I could not think of a more perfect idea for a small start-up food business with which to tour local markets and join in the festival season.
Conventional barbecue charcoal will typically burn at a maximum of 400°C (750°F), and it is important to keep this in mind, as many standard barbecues are built from steel and able to withstand only this level of heat. As bincho charcoal potentially burns at twice the intensity, I would not recommend placing these at the base of a standard barbecue as they could burn through the bottom. A drum or brick barbecue or a Weber barbecue are ideal for the DIY robata. Or the latest must-have is the Green Egg, an evolution of the hibachi - an egg-shaped cast-iron kettle lined with ceramic, which is able to withstand intense heat. Designed for direct and indirect grilling, it is very suitable for robata too.