Yamagata Ryuu (山形竜; born on June 1, 1999) is a former 1st Generation Little Ouji and member of Japanese pop group Luminus. He joined Little Ouji on February 4, 2009 and graduated on June 26, 2013.
On February 4, Yamagata, alongside 14 other boys, successfully passed the first auditions for HoshiBoshi Pro, making up the 1st Generation Little Oujis.
On May 25, it was announced that Yamagata alongside Saionji Hiro, Akimoto Kureno, Miyazono Takumi and Ayuzawa Kou, were to be members of the new group of HoshiBoshi Pro, Luminus. They debuted on June 26 with "Jinsei GAME".
- Name: Yamagata Ryuu (山形竜)
- Nickname: YamaRyu, Dragon-kun, Gata-kun, Fire-kun, Pun Master
- Birthday: June 1, 1999 (age 14)
- Birthplace: Kanagawa, Japan
- Blood type: O
- Height: 171cm (5"7)
- HoshiBoshi Pro Status:
- 2009-02-04: Little Ouji
- 2013-05-25: Luminus Member
- UP-FRONT PROMOTION Status:
- 2009-02-04: Member
- Months in Luminus: 3 Months
- Luminus Color: Green
- Eastern Zodiac: Rabbit
- Western Zodiac: Gemini
- Charm Point: Wit
- Weak Point: Talks too much, cant sit still
- Strong Point: Always Positive and shining!
- Favourite Animal: Dragon, Turtle
- Special Skill: Can make up puns on the spot
- Hobbies: Singing, Watching anime, Reading manga, Playing LoL
- Favorite Food(s): Ice Cream Cake
- Least Favorite Food(s): Spinach, Asaparagus
- Favorite Color(s): Green, Blue, Red
- Favorite Sport: Baseball
- Looks up to: HI-5, JupiNus, EXO, JJ Project
- Favorite Song: "Bounce" by EXO
- HoshiBoshi Pro Groups:
- [2013.06.26] Jinsei GAME
- [2013.07.20] Cosmic Dreamer
- [2013.08.31] Super Delicate
- Luminus members say that he's the brightest member.
- HoshiBoshi Pro members say that he always does the "Shake it" dance part to JJ Project's Bounce.
- Says his ideal girl is NeXus' Visual Sugiura Asuka.
- His cousin is Polaris α's Suzuki Eri.
- He is one of the shortest members of Luminus.
- If he was a girl idol, he would want to join Polaris α.
- Listens to K-Pop a lot, and is seen to be practicing dancing to K-pop songs to become better at dancing.
- Can make up really good puns on the spot (Is known as the Pun Master)
- He is currently in his last year of middle school.