HIKAKIN, one of Japan’s most prominent YouTubers known for his beatboxing, gaming streams, and product reviews, revealed on August 14 the details of a month-long countdown he had been running.
New Song Released on 10th Anniversary
On August 14, 2025, HIKAKIN released the music video for his new song “YouTube Theme Song 2,” created in collaboration with his older brother and fellow YouTuber, SEIKIN. The date marked exactly 10 years since the release of their original “YouTube Theme Song” music video.
The first “YouTube Theme Song,” released under the name HIKAKIN & SEIKIN on August 14, 2015, has become one of their signature tracks, amassing approximately 146 million views to date. The new version is a completely revamped production, with both the visuals and lyrics updated.
Month-Long Mystery Countdown Stirs Buzz
Starting in mid-July, HIKAKIN began a countdown on his social media accounts and YouTube channel header image, sparking a wave of speculation among fans. On August 13, the day before the countdown hit zero, he commented, “Tomorrow will be a day that will be engraved in the history of my YouTube career,” further building anticipation.
Message of Gratitude to Fans
Following the release of the new song, HIKAKIN updated the video’s comment section with the message: “We’ve reached the continuation of that song together. This track is filled with the 10 years I’ve spent walking alongside my brother and all of you, my fans. I want to keep moving forward with everyone who’s been part of this journey. From the bottom of my heart, thank you.”
A Pioneer in the YouTuber Scene
HIKAKIN began his YouTube career in high school and has since collaborated in beatboxing performances with international artists such as Aerosmith and Ariana Grande. He currently operates four channels—HIKAKIN, HikakinTV, Hikakin Games, and HikakinBlog—and holds the record for the highest combined subscriber count in Japan.
In 2013, he co-founded UUUM, a talent management agency specializing in YouTubers, where he now serves as Founder and Senior Advisor. Known for his influential product review videos, which often drive massive sales, he has also had a significant impact on Japan’s economy.
The release of “YouTube Theme Song 2” marks a major milestone in HIKAKIN’s YouTube career and is expected to remain beloved by fans for years to come.
