CREATE TABLE table_203_55 (id DECIMAL, "japanese title" TEXT, "western title" TEXT, "regions" TEXT, "release" DECIMAL, "platform ( s ) " TEXT, "genre" TEXT)

which platforms had the most titles released ?
SELECT "platform(s)" FROM table_203_55 GROUP BY "platform(s)" ORDER BY COUNT("japanese title") DESC LIMIT 1
SELECT "platform(s)" FROM "table_203_55" GROUP BY "platform(s)" ORDER BY COUNT("japanese title") DESC NULLS LAST LIMIT 1