This is the 2046th most frequent Japanese word.
之
"之" is a classical or literary term meaning "of," "this," or "it," often used in formal or archaic contexts.
Here, '之' is an old-fashioned character used demonstratively as 'this'.
之の山を越えれば村が見えます。
If you cross this mountain, you will see the village.
In this sentence, '之' is used in the sense of 'his', showing possession, a classical usage.
彼之風格は独特です。
His style is unique.
Here, '之の' is used in a simile or comparison, an old literary use.