Duke is the crown prince and sole survivor of Planet Fleed, which was destroyed by the forces of King Vega. He has found a new home on planet earth and vowed to protect his new homeland and take revenge on King Vega and his minions. With the super robot Grendizer at his command, Duke Fleed fights back invasion after invasion in the 74 episodes of the Ufo Robot Grendizer series, with the help of former Mazinger Z pilot Kouji Kabuto, who serves as his sidekick.    Duke Fleed&#039;s earth name is Daisuke Umon. He has been adopted by Professor Umon, head of the Space Science Lab and purports to be a normal human. He works as an employee of farmer Danbei Makiba. Only Professor Umon, Kouji Kabuto, Dankei&#039;s daughter Hikaru and her little brother Goro know of Duke Fleed&#039;s secret identity and nature as an alien.     (Source: Wikipedia)

A giant sea monster known as "Dragonsaurus" has emerged from out of nowhere, terrorizing the depths of the oceans. Great Mazinger, Grendizer and the Getter Robo G team join forces to combat the new threat. But their task becomes more complicated when Dragonsaurus swallows up Boss Borot and makes its way towards Tokyo.
 
(Source: Anime News Network)

A Japanese actor, seiyuu, and narrator. During his life, Tomiyama was affiliated with Aoni Production and Production Baobab. He died of pancreatic cancer.

Duke Fleed is a survivor of the Fleed Planet who is escaped to the Earth, onboard a mysterious "spaceship", where is raised by Dr. Umon as his adoptive son, and known as Daisuke Umon. Years after his arrival, he's faced with the threat of King Vega and his army, who want to conquer the Earth. With his friends Koji and Hikaru (and later his younger sister Maria Grace), Duke decides to fight back using his best weapon - the almighty Grendizer.

Alien invaders take over Great Mazinger who is at the entrance of a museum next to Mazinger Z as symbols of peace. Grendizer fights the evil invaders and Great Mazinger is recovered. 
When the Vegan empire dispatches a new general to oversee the takeover of Earth, he quickly manages to capture Koji Kabuto and, learning of Great Mazinger through interrogation, quickly commandeers it from a museum where it was kept as a symbol of peace. 
It is now up to Duke Fleed aboard Grendizer to stop humanity's former defender from becoming its destroyer.
 
(Source: Anime News Network)

The pilot movie of Grendizer. It is about Duke Fleed, a fugitive of the planet fleed, who was kicked out of his planet by the Armies of Vega. Fleed and the daughter of the king of Vega were in love before the war between their planets. The armies of Vega continue their fight with Duke Fleed.
 
(Source: Anime News Network)

A short manga version of the UFO Robo Grendizer anime. Released along the anime series, UFO Robot Grendizer follows the adventures of Duke Fleed, the Prince of Planet Fleed, whom disguised as Daisuke, a farm worker, fights against the forces that destroyed his planet, the Vegan Empire, also the creators of Grendizer that Duke stole to fight them. While not originaly considered part of the Mazinger series, Koji Kabuto and the Mazinger mechas appear in this series, making it sort of a sequel. Grendizer introduced the concept of a transformable Robot and a space Mecha, concepts that were later taken into other mecha series. It was extremely popular in Japan, Canada, France, Italy and the Arab World and has a strong following in those countries even today. (mangaupdates.com)

The story will be a full reboot of Nagai's UFO Robo Grendizer story. When a great fleet of flying saucers invades Earth, it awakens the true power of Daisuke Uryuu (the main lead of UFO Robo Grendizer was named Daisuke Umon).
 (Source: Anime News Network)

After finally defeating Dr. Hell, Kabuto Kouji has to battle the forces of the Mikene Empire. Against an enemy unknown even to Minerva X, who has seen countless alternate timelines, Mazinger Z faces his most desperate moments!

Following a devastating attack by Vega's forces on planet Fleed, Duke Fleed, and Grendizer escaped to Earth. When he got there, Dr. Amon, the head of the Space Research Center, adopted him and gave him the name Daisuke. While they were working side by side in the center on a quest to find out what strange objects appeared in the city's sky! They were surprised by an attack that jolted Daisuke's memory.

[Agency Profile](https://junction99.com/?page_id=1134)

He joined a theater troupe when he was 4 years old, and two years later made his acting debut in the historical drama Korczak. He remained with the theater troupe until March 2006, when he moved to Junction.

Made his voice acting debut in 1996 on [Taiho Shichauzo](https://anilist.co/anime/1577/). He auditioned and got the role of [Haku](https://anilist.co/character/385/) in the 2001 film [Spirited Away](https://anilist.co/anime/199/). The same year, he voiced the eponymous main character in [PaRappa The Rapper](https://anilist.co/anime/3736/), and the following year he started voicing Sora in the Kingdom Hearts video game series, a character who he still voices to this day.

He released his debut mini-album Soleil on June 26, 2009 and his first single album, Faith, on November 25, 2009. Since May 2010, he and [Hiroshi Kamiya](https://anilist.co/staff/95118/) formed a music duo called [KAmiYU](https://anilist.co/staff/116031/). Their first mini-album "link-up" was released on August 3, 2011.

Announced his marriage with an unspecified woman on September 3, 2021.

__Non-anime voice roles:__
- Sora - *Kingdom Hearts* series (VG)
- Cyno - *Genshin Impact* (VG) 

Suddenly, a UAP (Unidentified Aerial Phenomenon) of the Vega Alliance appeared on Earth. Humanity is helpless in the face of Vega's overwhelming military might, but then "Mazinger Z" operated by Kouji Kabuto, and "Grendizer" piloted by Duke Fleed, appear on the scene. Why did Duke Fleed, the prince of the planet Fleed, come to earth? What kind of life did he spend in his homeland?
 
 Note:The story of "The Inception" opens with a prequel that is not told in the TV anime.

MazinSaga is a manga written and produced by Go Nagai between 1990 and 1998; currently on going again, it's the summa of Nagai's works, for the complexity of the plot and the treated thematic content. 
Mazinsaga tells the story of the young Koji Kabuto, university student who finds himself having to collect the fruit of the researches of his father, physicist of world-wide reputation who died in mysterious circumstances. 
The boy is thus given a powerful artefact, Mazinger Z, the Armor of God.