CREATE TABLE table_16410 ("Romaji title" TEXT, "Japanese title" TEXT, "Release date" TEXT, "Reference" TEXT, "Oricon" FLOAT)

What release date is when kids-270 is a reference?
SELECT "Release date" FROM table_16410 WHERE "Reference" = 'KIDS-270'
SELECT "Release date" FROM "table_16410" WHERE "Reference" = 'KIDS-270'