CREATE TABLE table_51180 ("Romaji title" TEXT, "Japanese title" TEXT, "Release date" TEXT, "Reference" TEXT, "Oricon" FLOAT)

What reference is used with the title ?
SELECT "Reference" FROM table_51180 WHERE "Japanese title" = 'アイシテル'
SELECT "Reference" FROM "table_51180" WHERE "Japanese title" = 'アイシテル'