Acrylic accessories shaped as tsuba (decorative sword guard) by Umetsukiyo. Some customers used them as striking obidome (decorative obi buckle) like in this very nice kitsune-themed outfit seen on.
Those fake-tsuba motifs are taken from folk stories, with from top to bottom + left to right:
Shuten doji, the great demon lord, one of the 3 most powerful yokai of Japan alongside Tamamo no mae and Otakemaru
Tsuchigumo, a monstruous man-eater ground spider
Nue, a shape shifting monster moving as a black cloud
Kokaji, a nod to a famous noh piece were a swordsmith received divine help from Inari itself
Hakuzosu, a famous kitsune who shape-shifted and took the identity of a buddhist priest
Kappa no u, from a folktale where the monk Osho saved a kappa’s life and received with thanks a pot holding the river’s song
Modoribashi, japan has numerous tales where oni guard a bridge, this one is probably refering to this Watanabe no Tsuna story
Ikkyu, is a very famous monk and the hero of many folk stories (I am not sure which episode is depicted here ^^;)
