/** ******************************
 * Japan mobile phone number *
 *********************************/
/**
 * starts with 070, 080, or 090
 * Mobile telephony and data services (PDC, J-CDMA, UMTS)
 * reference: https://en.wikipedia.org/wiki/Telephone_numbers_in_Japan
 */
export declare function is_jp_mobile_phone_prefix(tel: string): boolean;
/**
 * with/without +81 prefix
 */
export declare function is_jp_mobile_phone(tel: number | string): boolean;
/**
 * very forgiving
 *
 * @returns +81xxxxxxxxxx if valid (10 digits after country code)
 *          empty string if not valid
 *
 * Handles all combinations (ordered by specificity - longest first):
 * WITH leading 0 (11 digits):
 * - Country code +81: +8109012345678 → +819012345678
 * - Country code 81 (no +): 8109012345678 → +819012345678
 * - No country code: 09012345678 → +819012345678
 *
 * WITHOUT leading 0 (10 digits):
 * - Country code +81: +819012345678 → +819012345678
 * - Country code 81 (no +): 819012345678 → +819012345678
 * - No country code: 9012345678 → +819012345678
 */
export declare function to_full_jp_mobile_phone(tel: string | number): string;
/**
 * @returns +81 90 xxxx xxxx if valid
 */
export declare function format_jp_mobile_phone(tel: string | number): string;