Postage stamps and postal history of Costa Rica change in currency from "Reales" to the new Pesos and "Centavos", the issue of 1863 was surcharged with new values for postal use: 1 Centavos, 2 Centavos, 5 Centavos (all over the Medio Real stamp), 10 Centavos (over Dos Reales) and 20 Centavos (over Cuatro Reales). The 5, 10 and 20 Centavos were also surcharged "U.P.U." Costa Rican stamps were issued overprinted "Guanacaste" in 1885-89 following war with Nicaragua over the sovereignty of Guanacaste. The first issue in the new "Colón" currency was dated 1900 and put into circulation in 1901. It consists of ten stamps with values ranging from
Japanese currency the issuance of convertible banknotes, a central bank, the Bank of Japan, was established in 1882. The bank would stabilize the currency by centralizing the issuance of convertible banknotes. The first central banknotes were issued by the Bank of Japan in 1885. They were called Daikokusatsu (大黒札), and were convertible in silver. Following the devaluation of silver, and the abandon of silver as a currency standard by Western powers, Japan adopted the gold standard through the Coinage Law of 1897. The yen was fixed at 0.75g of pure gold, and banknotes were issued which were convertible into gold. In 1899,