He built one of the most exciting pop acts on the planet. Then, hours after their concert ended, police knocked on his hotel room door. SIMON, the sole creative mind behind Japanese global group XG, has been arrested for cocaine possession mid-world tour. Here's what happened, what it means, and what comes next.

XG Producer SIMON Arrested for Cocaine in Nagoya Hotel

In the early hours of February 23, 2026, officers from the Tokyo Metropolitan Police Department's Drug and Firearms Division arrested SIMON, legal name Sakai Junho, age 39, at a hotel in Aichi Prefecture on suspicion of cocaine possession. One bag of cocaine was recovered from the room, along with what appeared to be dried cannabis. Three other men were also taken into custody. The arrest was made in flagrante delicto, meaning officers caught him with the substance at the scene.

The timing is what makes this story devastating. Just hours earlier, XG had wrapped up the final night of their Nagoya concerts at IG Arena, part of their ongoing 2nd World Tour "The Core." SIMON, who routinely DJs at XG shows, had been present at the venue. By approximately 8:00 AM the same morning, he was being escorted by investigators from Nagoya to Tokyo Station, with footage airing on FNN (Fuji TV's news platform). The story broke at 10:00 AM JST and spread rapidly through Kyodo News wire services to every major Japanese outlet.

As of this writing, SIMON has neither confirmed nor denied the allegations. No information about his legal representation has been made public.

Who Is SIMON JAKOPS, And Why Is He Irreplaceable?

To understand the magnitude of this arrest, you need to understand that SIMON isn't just an executive sitting in a corner office. He is XG.

Born Sakai Junho on May 29, 1986, in Seattle, Washington, to a Korean father and Japanese mother, SIMON carries a multicultural identity that became the blueprint for everything he built. His professional alias "JAKOPS" stands for JApan + KOrea + Produced by Simon, a name that encapsulates his cross-cultural creative philosophy.

SIMON entered the industry as a rapper in the K-pop boy group DMTN (formerly Dalmatian), which debuted in 2010 and went on hiatus in 2013 after a member's marijuana scandal, a painful historical parallel. He pivoted to songwriting, contributing Japanese lyrics for TWICE hits including "TT" and "Like OOH-AHH," before founding XGALX in 2017 as a joint venture with Japanese entertainment powerhouse Avex. He spent four years hand-selecting and training seven Japanese women, debuting XG in March 2022.

What makes SIMON's role extraordinary is its scope. Unlike typical pop production systems where songwriting, production, and creative direction are distributed across teams, SIMON personally wrote and produced every XG song from debut single "Tippy Toes" through their acclaimed first full album "THE CORE - 核" (released January 23, 2026). He also directed visuals, choreography concepts, and tour staging. He earned the Nikkei Entertainment Hitmaker of the Year 2025 (Global Award) and Best Producer at the MTV VMAs Japan.

Just 24 days before his arrest, the Hollywood Reporter published a feature interview where SIMON discussed relocating to the United States to accelerate XG's global expansion. We previously covered this strategic vision in detail on this site (JAKOPS Interview: U.S. Move and "THE CORE" Global Strategy). The ambitious plans outlined in that interview, building an identity that "belongs nowhere yet resonates anywhere", now face an existential threat.

XG's Historic Rise, And Everything at Stake

XG (members: JURIN, CHISA, HINATA, HARVEY, JURIA, MAYA, and COCONA) had been on a trajectory unlike anything in Japanese music history. Their achievements include being the first Japanese act to headline Coachella's Sahara Stage (2025), selling out Tokyo Dome, charting on Billboard's U.S. Radio Top 40 (a first for any Japanese group), and landing partnerships with Gucci, Nike, Anessa, and McDonald's Japan. In December 2025, member Cocona came out as transmasculine nonbinary, marking an unprecedented moment of LGBTQ+ visibility in Japanese entertainment.

Their 2nd World Tour "The Core" launched at K-Arena Yokohama on February 6, 2026, with completed dates in Yokohama (Feb 6–8), Osaka (Feb 17–18), and Nagoya (Feb 21–22). The tour was set to continue across Japan, including a March 14 show at Sundome Fukui, before expanding to Asia, North America, the UK, Europe, Australia, and Latin America in what would have been XG's largest global tour. XGALX was also reportedly preparing to debut a second girl group in 2026.

No official statement had been issued as of midday on February 23, when the news first broke. The following day, February 24, Avex released a statement pledging full cooperation with the police investigation, and XG's members posted a comment on the group's official X account stating clearly that "XG has no involvement whatsoever in this matter."

Japan's Zero-Tolerance Drug Culture: What History Tells Us

Japan enforces some of the strictest drug laws among developed nations. Cocaine possession under the Narcotics and Psychotropics Control Act carries penalties of up to seven years in prison. But in Japanese entertainment, the professional and social consequences typically far exceed the legal ones.

The precedents are stark. When electronic musician Pierre Taki (of Denki Groove) was arrested for cocaine in 2019, his music was pulled from streaming platforms, he was removed from video games, and all professional activities ceased. Singer ASKA saw his mainstream career effectively end after drug arrests in 2014 and 2016. The pattern is consistent across the industry: broadcast appearances frozen, endorsement deals terminated, content delisted, and professional rehabilitation measured in years.

For XG, the structural vulnerability is uniquely severe. SIMON is not a behind-the-scenes executive who can be quietly replaced, he is the creative identity of the group. Avex, as the parent company, has the infrastructure for business operations, but replacing SIMON's artistic role would fundamentally change what XG is.

Under Japanese criminal procedure, police can hold SIMON for up to 72 hours before prosecutors must seek a formal detention order, which can extend custody for up to 20 additional days. With a flagrante delicto arrest and physical evidence, a case dismissal would be unusual.

Public Reaction: Shock, Grief, and Concern for XG

Within hours of the story breaking, it reached #2 on Yahoo! Japan's trending rankings and #2 on Livedoor News nationally, with over 415 comments flooding the Yahoo! News article in the first hours.

What sets this case apart from typical entertainment scandals is the unusually close relationship fans had with SIMON. In K-pop and J-pop fandoms, agency executives are often viewed with suspicion. But XG's global fanbase, the ALPHAZ, had embraced SIMON as a transparent, supportive leader. Fan content across TikTok, X (formerly Twitter), and YouTube routinely praised him as "the best CEO in the industry." This positive perception means the sense of betrayal cuts deeper than a typical management scandal.

It bears emphasizing: there is absolutely no indication that any XG member was involved in or aware of any illegal activity. The seven members are bystanders to a crisis created by the person they trusted most with their careers.

What Comes Next: Three Factors to Watch

The path forward depends on three key variables.

Avex's corporate response, Whether the parent company moves to insulate XG's activities from SIMON's legal situation, or follows the typical Japanese entertainment pattern of suspending all operations. With world tour tickets already sold and a massive international fanbase waiting, this is a high-stakes decision with no easy answer.

The legal outcome, Whether formal charges are filed and how the case proceeds. The flagrante delicto arrest with physical evidence makes the situation legally challenging for the defense, but the ultimate disposition will shape the medium-to-long-term outlook.

The international dimension, XG operates primarily in global markets where drug-related incidents carry far less professional stigma than in Japan. This creates a tension between domestic cultural expectations and international career viability that will complicate every strategic decision going forward.

Can the system SIMON built survive without him? Or does XG's extraordinary rise become an equally extraordinary cautionary tale about having a single creative linchpin? The situation is still unfolding, but one thing is certain: this is a turning point for XG and the broader Japanese pop music industry.

In Japan, drug-related arrests in the entertainment world carry severe social and professional consequences, often far beyond the legal penalties. How are cases like this handled in your country? Do you believe an artist's personal legal troubles should be separated from their creative work? We'd love to hear your perspective.

References