

Shion left Texas to get a master's in engineering at Cornell University, but returned soon after Ryan's birth, completing the degree online. Loann's family fled from Vietnam as refugees, and she grew up in Houston hoping to become a teacher, which she later did. Shion moved to the United States from Japan in high school and is the son of a microchip executive. Ryan Kaji's parents Shion and Loann met as undergraduate students at Texas Tech University. The Verge has described the channel as "a mash-up of personal vlog and 'unboxing' video, a blend of innocent childhood antics and relentless, often overwhelming consumerism." According to Forbes, Kaji earned $11 million between 20 as the eighth highest-paid YouTuber, and in 20, was listed as the highest-paid YouTuber, earning $22 million and $26 million respectively from his videos and product line. The channel is one of the Top 10 most-subscribed YouTube channels in the United States.

As of January 2023, the channel has over 34 million subscribers and over 45 billion views. One of the channel's videos, titled Huge Eggs Surprise Toys Challenge has over 2 billion views as of January 2023, making it one of the 60 most-viewed videos on YouTube. The channel usually releases a new video daily. Ryan's World (formerly Ryan ToysReview) is a children's YouTube channel for children aged 2–6 featuring Ryan Kaji along with his mother (Loann Kaji), father (Shion Kaji), and twin sisters (Emma and Kate).
