Guest Commentator (Road to the Top)

"That's right. T.M. Opera O, Admire Vega, and Narita Top Road. Any one of them could easily emerge victorious."

- Guest Commentator Guest Commentator (解説, Kaisetsu) is one of the supporting characters in the Uma Musume: Pretty Derby Road to the Top.

He commentates at races of the Twinkle Series.

Appearance
Almost same as real-life Masahiro Yamamoto.

Relationships

 * Live Commentator (Road to the Top): Commentates with him.
 * Junko Hosoe: Guest commentator in the anime main series.
 * IRL: Both are real-life race commentator. They have appeared together in Keiba BEAT.

Trivia

 * He is obviously based on Masahiro Yamamoto, however, nobody calls his name in the anime, so it is unknown whether he is Masahiro Yamamoto.



Real Life?
"I'd played sports, too (lol). I've seen many recruited horses since I started a one-bite owner in a thoroughbred club, so I vaguely understand some of their physical abilities."

- Yamamoto Masa Masahiro Yamamoto is a sport commentator, a racehorse investor, an RC car driver, a former beetle breeder, and a former baseball player in Chunichi Dragons.


 * He has many hobbies, and he has excellent skills for many of them. So fans joke "His primal profession is xx, and baseball is his hobby."
 * He likes horseracing, and invests for some horses in Sunday Thoroughbred Club. Al Ain and Shahryar are the ones he invested for.
 * In 1990, Yasushi Yamamoto entered to Chunichi Dragons, so his name on scoreboards changed to Yamamoto Masa (山本昌), for distinguishing Yasushi. Since then, he became strong, so he had never changed his registered name despite Yasushi transferred to Chiba Lotte Marines in 1995. After Masa's retirement, he gives his name as Yamamoto Masa when he works as a commentator.
 * He had been a baseball player for thirty years. In Uma Musume namesakes, there are only two racehorses that don't share their active ages, such as Maruzensky and Daring Tact.
 * He has an excellent skill for RC cars, He developed a RC car chassis and held a tournament "Yama-Yama Hai" with Takeshi Yamasaki.
 * He had bred rhino beetles and stag beetles. Once he kept over 50 of Japanese stag beetles, however, his 2007 result was bad, so he gave all of his insects to his friends, and stopped keeping beetles.