Workers from Thailand work at Green Leaf farm, in Showa Village, Gunma Prefecture, Japan, June 6, 2018. Picture taken June 6, 2018. REUTERS/Malcolm Foster/File Photo Acquire Licensing Rights TOKYO, Nov 18 (Reuters) - In a major shift for a country long closed to immigrants, Japan is looking to allow foreigners in certain blue-collar jobs to stay indefinitely starting as early as the 2022 fiscal ye