- Name: Okamoto Keito (岡本圭人)
- Nickname: Keito, Katie/Katy
- Birthdate: April 1, 1993
- Birthplace: Osaka, Japan
- Hometown: Tokyo, Japan
- Blood Type: O
- Height: 176cm
- Weight: 64kg
- Shoe size: 28cm
- Eyesight: 1.0(Right) 0.1(Left)
- Family: Father Okamoto Kenichi is a former member of the rockband Otokogumi, mother is the model Nishi Katsue (they are divorced).
- Pet: Chihuahua Dog called "Misha"
- School: Sophia International University (English Literature)
- Instruments: Guitar
- Favorite Food: Fried Chicken, Ice Cream and Strawberry Milk
- Dislike Food: Seafood, leek,goya
- Most afraid of: Ghosts and cockroaches
- Eyesight: Right 1.0 and left 0.6
- Weakness: The sides of my body.
- Favorite homecooked meal: Carbonara
- Respected Senior: Okamoto Keinichi, Takizawa Hideaki
- Favorite Kouhai: Nakajima Kento
- Charming Point: Mole under right eye
- Girl Type: Nice, kind, does things freely, peaceful, honest, neutral, optomistic, hard-working, spoil, long, wavy hair (dark brown, brown, or black), cute smile, girly clothes: pumps, skirts-max down the knees, and likes hand warmers.
- Dream: To be a doctor
- Possible Apology: "I don't have anything to "apologize now" because I always apologize after I done a bad thing."
- Favorite song: Pikanchi Double by Arashi , Code by Nishikido Ryo, Orange by SMAP
- Favorite Color: Blue
- Favorite Member: Yamada Ryosuke
- Love confessions: zero
- Favorite subject: Math
- Childhood dream: To be a doctor.
- Favorite TV show: Doraemon
- Special ability: Unintentionally funny
- Favorite place to shop: Convenience store
- Favorite fashion item: bumpy black scarf.
- Favorite movie: Pirates of the Caribbean. Johnny Depp acting Captain Jack Sparrow is cool.
- Favorite book: Myojo (Magazine that he appears in every months)
- Favorite manga: "Kochikame" I don't have all the volumes but I have about 50 at home.
- Favorite ramen: Tonkotsu, without leek. I hate leek.
- Agency: Johnny's Entertainment
- Date entering Johnny's: 14th August 2006
- Since 5th grade of elementary school (10 years old) until he was about to start 3rd year of middle school (14 years old), Keito lived and studied in Suffolk (England). As the public announcement about his joining showbusiness he returned back to Japan.
- Even though he's good at English, he's said that he hates speaking it.
- He doesn't eat fish because he think they're too pretty and thus he prefers to only watch them.
- When Keito told his father about his debut, he told him that he wouldn't lose to him.
- His favorite TV drama My boss my hero
- His favorite Hey! Say! Jump song is Your Seed
- He good at billiards. He used to play it a lot during my break time when he was attending a school in England.
- His body is stiff.
- San nen B-gumi Kinpachi-sensei Final SP (March 27, 2011)