CREATE TABLE table_2413 ("Broadcast scope" TEXT, "Broadcast network" TEXT, "Broadcast term" TEXT, "Broadcast day and timings  ( in JST  ) " TEXT, "Broadcast format" TEXT)

Name the broadcast network for chiba prefecture
SELECT "Broadcast network" FROM table_2413 WHERE "Broadcast scope" = 'Chiba Prefecture'
SELECT "Broadcast network" FROM "table_2413" WHERE "Broadcast scope" = 'Chiba Prefecture'