The United Kingdom and Japan on Tuesday signed a letter of arrangement to pursue cooperative research on a “world-leading” fighter jet sensor beginning in April, the British Ministry of Defense said. The project, known as Jaguar, will be designed to allow the armed forces to better detect “future threats from air, land, and sea quickly” and “denying surveillance technology” operated by their adversaries. The ministry said that the process of developing the system would take around five years, involving input from aerospace company Leonardo UK and its counterpart in the Japanese industry. Two technology demonstrators will be built as part of the project, with one going to each country, it added. “This crucial relationship will see us acquire truly advanced technology to protect our nations for decades to come whilst creating significant investment and highly-skilled jobs in the UK and Japan,” Jeremy Quin, defense procurement minister, said in a statement. …