Kajisac Biography: Age, Wife, Kids, Height, Net Worth, Parents, YouTube, Comedian
Yūta Kajiwara, known to a vast online audience as Kajisac, is a Japanese comedian, YouTuber, and actor who reinvented his career by embracing the digital stage.
As the boke half of the comedy duo King Kong, he spent two decades in television before launching the YouTube channel Kajisac no Heya in 2018 with a public vow to retire if he failed to reach one million subscribers.
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He surpassed that goal with months to spare and has since built one of Japan’s most successful creator-led brands, while also expanding into acting and voice work.
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| Wiki Facts & About Data | |
| Real Name: | Yūta Kajiwara |
| Stage Name: | Kajisac |
| Born: | 7 August 1980 (age 46 years old) |
| Place of Birth: | Miyakojima-ku, Osaka, Japan |
| Nationality: | Japanese |
| Height: | 1.63 m |
| Parents: | Mr. and Mrs. Kajiwara |
| Siblings: | 2 |
| Spouse: | Mikiko Sonoda (m. 2007) |
| Relationship: | Married |
| Children: | Kanna Kajiwara, Chojiro Kajiwara, Haru Kajiwara |
| Occupation: | Comedian, YouTuber, actor |
| Net Worth: | $5 million |
Early Life and Education
Kajisac first saw the light of day on 7 August 1980 in Osaka, Japan. Of Japanese origin and raised in a Shinto household, he was the youngest of three sons born to Mr. and Mrs. Kajiwara, with two older brothers who were seven and five years his senior.
His parents divorced when he was in the second grade, and he was subsequently raised by his mother in a single-parent household, an experience he has often credited for shaping his work ethic.
Kajiwara attended Takakura Junior High School in Osaka, where he excelled in soccer and harbored serious ambitions of becoming a professional player before his height limited his prospects.
He went on to Taisei Gakuin University High School, graduating from its electronic machinery department, and later enrolled at the Yoshimoto New Star Creation (NSC) Osaka school as part of its 22nd graduating class, where he met his future comedy partner, Akihiro Nishino.
Career
Kajisac formed the comedy duo King Kong with Akihiro Nishino in September 1999 while both were students at NSC Osaka. The pair made their professional debut under Yoshimoto Kogyo and gained national exposure in 2001 through the Fuji Television variety show Haneru no Tobira, where Kajiwara’s small stature and sharp, physical comedic movements became his signature.
The duo won the Best Newcomer Award at the 22nd ABC Owarai Newcomer Grand Prix in 2001, and their television profile continued to rise as Haneru no Tobira moved into a golden-time slot. By the 2010s, however, the show had ended and Kajiwara found himself at a professional crossroads, at one point seriously considering retiring from comedy altogether.
The turning point arrived in 2018, when Kajiwara announced he would launch a YouTube channel under the name Kajisac and retire from comedy if it failed to reach one million subscribers by the end of 2019.
He debuted Kajisac no Heya on 1 October 2018, adopting a red tracksuit and white towel as his on-screen persona, and the channel’s growth was rapid.
He crossed the one-million mark in July 2019, roughly six months ahead of his self-imposed deadline, and the channel eventually surpassed two million subscribers.
Unlike his partner Nishino, who left Yoshimoto in 2021, Kajiwara chose to remain with the agency, and he has continued to produce daily-style variety content while bringing comedians, celebrities, and his own family into the fold.
In recent years, Kajisac has broadened his reach beyond YouTube into acting and voice performance. He appeared in the Japanese dubbed cast of Peter Rabbit 2, took a role in the Hulu drama Punch Drunk Woman Season 2 alongside his daughter Kanna, and participated in the stage greeting for the animated film Pueru: The Promise of the Clock Tower.
His career arc, from a television comedian facing irrelevance to a creator who built a thriving independent media business, has made him a frequently cited model for entertainers navigating the shift from broadcast to digital platforms, and his gamble on YouTube remains one of the most discussed career reinventions in contemporary Japanese comedy.
Social Media
- Instagram Handle: @kajisac_yukaikamafetachi
- Twitter/X Handle: @kajisac_onashas
- TikTok Handle: @kajisac_room
- YouTube Channel: Kajisac no Heya (カジサックの部屋)
Personal Life
Kajisac was first married in March 2003 to Mutsuki Kajiwara, and the union ended in divorce in April 2004.
He remarried in 2007 to Mikiko Sonoda, a former reader model known to audiences as “Yomesac,” and the couple has built a large household of five children: sons Fuyushi and Torajiro, and daughters Kanna, Chisuzu, and Haru.
His family frequently appears in his videos, and he has spoken about the financial pressures and joys of raising five children, as well as the stability his wife has brought to his life after a difficult start to his adult years.
The family completed construction of a new home in 2025, an event Kajiwara shared with his viewers as a milestone of his post-television success.
Net Worth
Kajisac has an estimated net worth of approximately $5 million, accumulated through more than two decades in Japanese entertainment. His primary income sources include advertising revenue and sponsorship deals from Kajisac no Heya, merchandise and event revenue tied to the Kajisac brand, continued television and acting appearances, and his earnings as a long-serving member of King Kong under Yoshimoto Kogyo.
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