Kamiki attended Kitahara Kindergarten in April 1997 and graduated in March 2000. He entered Fujimi Shiritsu Tsuruse Elementary School in April 2000 and graduated in March 2006.

He made his debut at the entertainment industry at 2 years old for a commercial for a Toy box. His drama debut was the role of Naoya Kurosawa in the drama “Good News” in April 1999. He has been doing voice acting since the age of 5. He met Kantarō Suga while attending elementary school. They first met on an audition and worked together in omnibus movie “ZOO”. He began acting as a child actor after entering the Central Group talent agency. Kamiki won the Rookie Award 2020 for Elan D’or Award Ceremony. One of the most prestigious awards in Japan, for completing 25 years in the industry.

He entered Meguro Nihon University Junior High School in April 2006 and graduated in March 2009. When he was in junior high, he joined the ping pong club. He said it would be no fun if he didn’t know how to play table tennis when visiting hot springs. His special skills are tennis, table tennis/ping-pong, darts. Once he got into a fight in school, but because his public image is so etched into everyone’s brain, his parents were surprised since this was “out of character for him”.

He is widely loved and appreciated by many famous Japanese actors and screenwriters. He worked with well-acclaimed Japanese screenwriter & director, Kankuro Kudo for the 1st time in 2011, playing the main character in the award winning TV drama 11 nin mo iru!. They worked together again in the 2016 film Too Young to Die and for the 2019 NHK Taiga drama Idaten: Tokyo Olympics Banashi. It is a running Gag in his fandom and amongst his closest friends, that whatever he wishes for he somehow ends up getting it.

He graduated from Horikoshi High School in 2012 together with Hey Say Jump’s Yamada, Chinen and Yuto. Kamiki is a mood maker in class. He thought that everyone in class looked like Noh masks, Since it was boring as is, he decided he should do something interesting so that the in future, his classmates remember that there was a strange guy called Kamiki in class.

He has a tendency to call people by nickname. He will often call people by the characters they played with him on screen. In an episode of VS Arashi it was discovered that, he calls Sho Sakurai, “Sensei” because he played a teacher in their drama Kazoku Game in 2013, He calls Emi Takei, “Okaasan” because she played his mother in the drama Taira no Kiyomori, even though she is younger than him by a month in real life. He refers to Satoh Takeru often as “Ken-san” or “Ken-sensei”.

In 2014, he starred in the drama adaptation of the novel “Henshin”. People who watched the drama “Henshin” seem to be roughly divided into those who were fans of reading the original “Henshin” before and those who first touched the work in this drama. But everyone had a common impression. That is, the acting of Kamiki, who played the role of the main character Junichi Naruse, was done wonderfully. He expresses how a young man who survived a dying severe illness is dominated by another personality due to a miracle operation. People who were fascinated by the power of acting devilishly praised it one after another.

Kamiki wrote “How to make the Dreams of the Masters come true” in 2015. He approached fifteen professionals who are active on the front lines of various fields. The most exciting special talk collection where you can see the thoughts and determination of the masters.

In 2019, he made his theatre debut with the play “Beautiful-The Woman Who Met with God” Directed/Written by Suzuki Matsuo. This work premiered at Bunkamura Theater Cocoon in 2000 as the first full-scale musical by Suzuki Matsuo, who presided over the adult program. After that, it was re-performed in 2005 and re-performed in 2014, and this time, which was the fourth time, Matsuo did not appear and concentrated on the production in order to improve the completeness of the work. In collaboration with Yotaro Ito, who has been in charge of music since the premiere, he build a more dense and multi-layered world of work. The stage is “another Japan” where three ethnic groups have been in conflict for 100 years. A truly chaotic world where the opposite keywords such as “life and death”, “despair and hope”, and “adults and children” are mixed. A girl, injured, who was kidnapped and confined and grew up in the basement, jumps out into reality.

After he was born, he was in the intensive care unit for four months and remained in critical condition for two months. As an infant, he lost weight rapidly due to a gastrointestinal disease of unknown cause, and it was dangerous enough that the doctor said the survival rate was 1%. According to the doctor, even if he survived he would still be disabled. He was finally discharged from the hospital when he was seven months old. His mother came up with the idea of making him a child actor because she had been pondering why he was born in this world, and from that, we can see that he was raised with a lot of love. His family consists of his grandparents, father, mother, a sister who is 11 years older than him and two nieces. His grandmother died in 2020.

In 2020, he became the brand ambassador for “Hondashi”, alongside Shun Oguri and Hana Sugisaki. While filming the commercial, the atmosphere between the tree veterans was so infectious that the director, for the first time in his career could not say cut, because it was so much fun to watch them.

On May 19, 2020, it was announced that he would start the “25th Anniversary of Debut Project”. On June 18, 2020, he created his own Youtube Channel, dubbed “Ryutube”. The book titled “Omote Kamiki / Ura Kamiki” was released on September 25. It was made as one part of his debut 25th anniversary project, and it shows the “front side” of Kamikir, as well as the “back side” of him as a regular 27-year-old man. It contains feature words and illustrations by Hayao Miyazaki and Toshio Suzuki. He debuted with his own radio show on All Night Nippon 0 (ANN0) on October 11, 2020, which will air late at night on the weekend.

Kamiki first started to conceptualize his yearly annual calendar in 2020. The theme of the calendar of 2020 being “Birthstones”. He thought about the themes himself for each month as well as how to shoot for a year with the motif of the color of the birthstone and the stone language.

He is an enthusiastic amateur photographer and had a dream of putting out a book of photographs of Takeru Sato one day. His dream came true in 2020.