5 Yen in Gold

The Bank of Taiwan was established in 1899 as a colonial financial institution under Japanese rule, tasked with managing currency across Taiwan and, eventually, extending Japanese financial influence into southern China and Southeast Asia. This 5 Yen gold note belongs to the earliest issues of that bank's paper series, before the gold convertibility clauses became effectively meaningless in practice — the Taisho-era monetary system nominally maintained gold backing long after actual redemption had become a bureaucratic fiction.

The "in Gold" designation is the detail worth pausing on. It survived on the face of Bank of Taiwan notes well into the period when the gold standard had been suspended, a legal formality retained to maintain confidence in a colonial currency whose authority rested entirely on Tokyo's backing.