List the name of all games published in Japan.
name of games refers to game_name; Japan refers to region_name = 'Japan';
SELECT T1.game_name FROM game AS T1 INNER JOIN game_publisher AS T2 ON T1.id = T2.game_id INNER JOIN game_platform AS T3 ON T2.id = T3.game_publisher_id INNER JOIN region_sales AS T4 ON T3.id = T4.game_platform_id INNER JOIN region AS T5 ON T4.region_id = T5.id WHERE T5.region_name = 'Japan'