Confrontation II: Trials and Tribulations by Simonkal of Inuy http://www.mediaminer.org/fanfic/view_st.php/130285
The action takes place in Japan in the mid-sixteenth century. In chapter 12 she describes the wall around a fortress made of "thick robust cinderblocks" A pretty neat trick since they won't be invented for a few hundred years. Closest I could narrow it down was some time between the late 19th and early 20th century.
Then in chapter 14 she has a character wear "a halberd on one hip, a sword at the other". Okay, so it's a bear youkai who is about eight feet tall, but even so, wearing a weapon that is at least six feet long on your hip has to be awkward. I suspect that the word does not mean what she thinks it does.
A halberd is a kind of European polearm with an axe and a spike at the end. The term has been used by Viz in it's translations of Inuyasha to refer to Banryuu, Bankotsu's polearm, which is a fantasy variant on the zanbatou, or horse killing blade. While the article at Wikipedia says that these are not known to be used except as temple displays I have seen an article that has a reference to these huge blades as being used experimentally at one point. I have lost the link and can't locate it at this time though.