In 2018 the U.S. state of Iowa listed Japan Drilling on its Iran prohibited companies list rendering Japan Drilling ineligible for investment and/or state contracting.--
In 2017 the U.S. state of California identified Japan Drilling as a company under review for potentially operating in Iran with ties to the Iranian government.
In 2017 the U.S. state of Rhode Island, South Carolina and Tennessee listed Japan Drilling on its Iran prohibited companies list rendering Japan Drilling ineligible for investment and/or state contracting.
"The oil rigs currently operating in Iranian waters mostly work for Iranian state-owned companies. The rigs are owned by a variety of foreign firms, including Norway's Sinvest, London-based Foresight Group, China Oilfield Service, Japan Drilling and Saipem, a subsidiary of Italian oil giant ENI. Industry sources said they would probably be certified by either Lloyd's or Bureau Veritas. BV did not respond to inquiries." (The Washington Post, "Congress sees shipping-certification firms as tool to tighten Iran noose," 12/5/2011)