Binchotan
To get the most out of your Shichirin requires special fuel, Binchotan charcoal. This special charcoal has very high carbon percentages allowing it to burn exceptional clean and hot.
The round version is best for Hibachi & Teppanyaki while the rectanglular version is your go to for a Konro & Yakitori grill. This is blurring as Yakiniku adds accessories making both models more flexible though.