Table schema:
CREATE TABLE table_name_63 (name VARCHAR, region VARCHAR, date_of_reclassification VARCHAR)

Question: WHose Name has a Region of kansai on 2012-04-01 ( core city )?
SQL: SELECT name FROM table_name_63 WHERE region = "kansai" AND date_of_reclassification = "2012-04-01 ( core city )"