The name is a play on words: binchōtan (備長炭) is a kind of charcoal, which is mainly used for cooking.

Relating to this dajare, the main cast is the moe anthropomorphic representations of different types of charcoal.

The anime is set in Minabe, Wakayama, a location that is the largest producer of binchōtan charcoal in Japan.

Incidentally, Wakayama in Kansai is famous for the production of binchōtan and Binchō-tan is the mascot of Kishu-Binchōtan Promotion Museum (紀州備長炭振興館, Kishu-Binchōtan Shinkoukan) operated by Minabegawa Forestry Society in Minabe, Wakayama.

Chiku-tan and Chiku-rin make plans to attend a festival and meet Binchō-tan after she has finished her work for the day.

She tells Aroe's fortune and they meet up with Binchō-tan and the Chiku sisters and share some Ramune Ren-tan has won.

Bincho-tan - Happy Calendar) for PlayStation 2 and its limited edition were released by Marvelous Interactive on April 26, 2007.