CREATE TABLE table_203_154 (id NUMBER, "type" CLOB, "manufacturer" CLOB, "numbers" CLOB, "year built" NUMBER, "quantity built" NUMBER, "power  ( horsepower ) " NUMBER, "max speed  ( km/h ) " NUMBER, "note" CLOB)

what are the number of times tokyu is listed as a manufacturer on this chart ?
SELECT COUNT(*) FROM table_203_154 WHERE "manufacturer" = 'tokyu'
SELECT COUNT(*) FROM "table_203_154" WHERE "manufacturer" = 'tokyu'