If it wasn't for 'Nishino' 'Urara' the Cucumber would also get 'The First Undefeated Triple Tiara' and the holder of 'The Fastest Triple Tiara' (both of which went to Daring Tact) on top of;
-Being the Queen of 2400m (world record holder)
-Highest G1 Win of 9 wins thus beating the Emperor's standard of 7 G1 Wins (first time in 35 years)
-Being one of the two horses (the first being Gentildonna) that can win Japan Cup twice
-Dethroning both of 2020's Undefeated Triple Crown and Undefeated Triple Tiara winners in her retirement race. Both Contrail and Daring Tact probably got serious PTSD from that.
-Being the winner of 2020 TRC Global Horses Rankings.
-Winning several JRA awards and a JRA Hall of famer
-Being considered as the most successful mare of all time.
-The first Japanese horse to reach more than 19billion yen in career earning.

She was only two Nishino Urara lengths short of being even more 'Perfectly Ultimate Idol'.