JPY to USD converter

This tool converts amounts from Japanese Yen to United States Dollars with configurable rate sources and formatting. It supports exact input values, currency codes, and optional historical dates or rate sources. The calculation concept is to multiply the amount in JPY by the selected USD/JPY rate to yield the USD amount. The system can use a mid-market rate or a manually supplied rate, and can apply rounding rules to two decimals for financial clarity. It also exposes the rate used and a timestamp for traceability, which is essential for audits or reconciliations. The tool is beneficial to travelers needing quick trip budgeting, importers pricing goods in USD, exporters reporting revenue, and analysts performing market comparisons. Its unique value lies in combining multiple rate sources, historical rate support, and explicit outputs that include rate_used and timestamp, enabling reproducible results across workflows. Core features include: input validation for amount and currency codes, support for historical or real-time rate selection, clear numeric outputs, and optional post-processing such as rounding or fee adjustments. Typical use cases include currency budgeting for travel, price conversion for overseas suppliers, and financial reporting requiring USD-equivalent figures from JPY costs.