Tsukumogamis are Phantoms born from the anger of the tools built due to being abandoned by humans. They appeared at the Musaigen no Phantom World series.
A Tsukumogami that Team E encountered are wood electrical posts possessed by a youkai. Their antenna releases electrical shocks when steady or being whipped.
In the past, people used to dance Limbo in honor of trees they cut down in the mountain. But after being abandoned by them, the Tsukumogamis are doing the Limbo themselves. Haruhiko mentioned that these phantoms already fulfilled their roles, but can't pass on. Tsukumogamis are dancing the Limbo to express their grief. Team E danced with them and after successfully finished the dance, the three Tsukumogami requested to be sealed as they are honored by Team E.