Nikaido Takashi (二階堂高嗣) is a member of Johnny's Entertainment junior group Kis-My-Ft2.
- Nicknames: Taa-Kun, Nika
- Birth Date: August 6, 1990
- Birth Place: Tokyo, Japan
- Blood Type: B
- Height: 172cm
- Weight: 60kg
- Shoe size: 26.5cm
- Family: Dad, Mom, Elder Sister, 3 Dogs (Maru, MoMo, and Mikan).
- Interest/Forte: Dance/Will not be late for dates or meetings.
- Hobbies: Observing people, dancing
- Strong Point: Doesnt take little things to heart, wont be late when meeting anyone
- Weak Point: Lives in his own world
- Special Ability: Can befriend people quickly even if he just met them
- Favourite Food: Meat, rice, fish, yakiniku
- Disliked Food: Green Pepper, Green Onion
- Favourite Colours: Black, White, Orange
- Favourite Sports: Soccer
- Favourite Subject: Mathematics
- Disliked Subjects: Everything other than Mathematics
- Favourite animal: Elephant
- Favourite phrase: Not defeated!
- Favourite item of Clothing: Wallet (made it himself and is very proud of it)
- Treasures the most: Family
- Entered Johnny's: February 4th, 2001
- He entered Johnny's the same time as Yokoo Wataru and Miyata Toshiya.
- He likes scary rides and often drags Senga Kento to the theme park.
- He thinks of himself as a bunny when he is lonely.
- He is very ambitious, versatile and tends to forget everything around him.
- He looks up to Kitayama Hiromitsu, Fujigaya Taisuke and Yokoo Wataru a lot.
- He quarrels with Senga often over trivial matters, mostly because they are so similar.
- He is also the critic of the group, and will say whatever is on his mind.
- He considers Akanishi Jin of KAT-TUN kakkoi/sexy and wants to be just like him.
- He wants to be able to act as good as Kamenashi Kazuya of KAT-TUN
- He is the brat and the biggest complainer in the group. He can be sarcastic at times even though he’s one of the youngest members.
- He can do a lot of impersonations perfectly.
- He is a scaredy cat too even though he’s known as a man with strong principle. Tamamori Yuta said that while they were staying in a hotel during a concert tour, Nikaido came to his room asking him to accompany him to the bathroom with a worried face.
- He had tried bungee jumping more to the reason that he lost in the group’s game that he had to do it.
- He loves to borrow things from Yokoo or to anyone. But most of the time, to Yokoo.
- He is the '2' in Kis-My-Ft2.
- He loves Mathematics.