/**
 * Converts a numeric value to Japanese words.
 *
 * This is the main public API. It accepts any valid numeric input
 * (number, string, or bigint) and handles parsing internally.
 *
 * @param {number | string | bigint} value - The numeric value to convert
 * @returns {string} The number in Japanese kanji words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {Error} If value is not a valid number format
 *
 * @example
 * toCardinal(42)           // '四十二'
 * toCardinal(10000)        // '一万'
 * toCardinal(100000000)    // '一億'
 */
export function toCardinal(value: number | string | bigint): string;
/**
 * Converts a numeric value to Japanese ordinal words.
 *
 * @param {number | string | bigint} value - The numeric value to convert (positive integer)
 * @returns {string} The number as ordinal words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {RangeError} If value is negative, zero, or has a decimal part
 *
 * @example
 * toOrdinal(1)    // '第一'
 * toOrdinal(10)   // '第十'
 * toOrdinal(100)  // '第百'
 */
export function toOrdinal(value: number | string | bigint): string;
/**
 * Converts a numeric value to Japanese currency words (Yen).
 *
 * Note: Sen (銭, 1/100 yen) is included for completeness but is rarely used
 * in modern Japan. Most transactions are in whole yen.
 *
 * @param {number | string | bigint} value - The currency amount to convert
 * @returns {string} The amount in Japanese currency words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {Error} If value is not a valid number format
 *
 * @example
 * toCurrency(42)     // '四十二円'
 * toCurrency(1)      // '一円'
 * toCurrency(0.50)   // '五十銭'
 * toCurrency(42.50)  // '四十二円五十銭'
 */
export function toCurrency(value: number | string | bigint): string;