Question: what is the most episodes when the average ratings is 18.8%?
SQL: SELECT MAX("Episodes") FROM "2-18540022-4" WHERE "Average Ratings" = '18.8%';

Question: How many episodes when the tv station is NTV and the japanese title is たったひとつの恋?
SQL: SELECT "Episodes" FROM "2-18540022-4" WHERE "TV Station" = 'NTV' AND "Japanese Title" = 'たったひとつの恋';

Question: what is the tv station when the romaji title is Kazoku~Tsuma no Fuzai・Otto no Sonzai~?
SQL: SELECT "TV Station" FROM "2-18540022-4" WHERE "Romaji Title" = 'Kazoku~Tsuma no Fuzai・Otto no Sonzai~';

Question: what is the tv station when the average ratings is 19.5%?
SQL: SELECT "TV Station" FROM "2-18540022-4" WHERE "Average Ratings" = '19.5%';