Nihon University Third High School Baseball Scandal: Prosecutors Probe Obscene Video Case Involving Underage Girl

Understanding the Incident at Nihon University Third High School

The recent scandal involving the baseball team at Nihon University Third Senior High School (commonly known as Nichidai Sanko or 日大三高) has sent shockwaves through Japan's sports and educational communities. Located in Machida City, Tokyo, this prestigious institution is directly affiliated with Nihon University, one of Japan's largest private universities. The high school serves as a key pipeline for talented students and athletes into the university's programs, making any misconduct here a matter of concern for higher education stakeholders.7576

On February 12, 2026, the Tokyo Metropolitan Police Department referred two current members of the school's hardball baseball team—aged 17 and 16—to the Tachikawa branch of the Tokyo District Public Prosecutors Office. They are suspected of violating Japan's Child Prostitution and Child Pornography Prohibition Law (正式名称: 児童買春、児童ポルノに係る行為等の規制及び処罰並びに児童の保護等に関する法律), specifically for coercing the production and dissemination of obscene materials involving a minor.68

The allegations center on interactions with a 15-year-old female acquaintance, likely from a nearby high school. Between March and April 2025, the 17-year-old suspect allegedly pressured the girl via social networking services (SNS) to self-record and send three obscene images and videos, using phrases like 'I'll definitely delete it right away' to gain compliance. Contrary to promises, one video was forwarded to the 16-year-old suspect between April and June 2025, who then shared it with multiple team members from May to October 2025. Investigations suggest dissemination within the 75-member team, potentially reaching dozens, though no external leaks have been confirmed.77

Timeline of Events Leading to Police Referral

To grasp the gravity, consider the step-by-step progression:

• March-April 2025: Initial coercion via SNS; girl sends materials under false assurances.
• April-June 2025: Video transferred internally between suspects.
• May-October 2025: Further sharing among baseball club members, coinciding with the team's preparation and participation in the summer National High School Baseball Championship (Koshien).
• Autumn 2025: Victim's side reports to police; MPD launches probe, seizing smartphones for analysis and interviewing involved parties.
• October 2025: School administration notified.
• February 12, 2026: Documents sent to prosecutors—no arrests due to juvenile status, likely heading to family court for disposition.

This timeline overlaps with the team's runner-up finish at the 2025 Summer Koshien, where over 50 million viewers tuned in nationally, highlighting the contrast between athletic glory and off-field behavior.76

The School's Storied Baseball Legacy and Affiliation with Nihon University

Founded in 1929, Nihon University Third High School's baseball program boasts over 40 Koshien appearances, a 2011 national championship, and the recent 2025 runner-up spot representing West Tokyo. Such success bolsters enrollment and feeds elite athletes into Nihon University's own sports teams, including baseball and American football.77

Nihon University (日本大学), with 80,000+ students across 16 colleges, relies on its network of 40+ affiliated high schools for preferential admissions and talent pipelines. These 'attached' schools (付属校) enhance the university's brand in competitive Japanese higher education, where sports achievements influence public perception and donor support. A scandal here risks tarnishing that pipeline, echoing the university's 2019 American football controversy where deliberate violent plays led to team suspension and coach resignation.

For prospective students eyeing higher education opportunities in Japan, such events underscore the need for institutions with robust ethical oversight.

Immediate Responses from Involved Parties

Both suspects fully admitted involvement during voluntary questioning, expressing remorse: one stated, 'I did something I should not have done. I deeply regret my reckless actions,' while the other echoed similar sentiments.75 The school confirmed awareness since October 2025 and announced it is 'considering measures for the baseball club's future activities,' potentially including suspensions or withdrawals from spring tournaments, per precedents like Koryo High School's 2025 mid-tournament exit over bullying.49

No formal statement from Nihon University headquarters yet, but as the overseeing body, expectations mount for transparency. In Japanese higher education, universities often intervene in affiliated school crises to protect enrollment—Nihon U's student numbers dipped post-2019 scandal before recovering via reforms.

Stakeholders include parents decrying athlete privilege, alumni worried about legacy, and the Japan High School Baseball Federation (JHSBF), which enforces strict conduct codes.

Legal Ramifications Under Japanese Law

The charges invoke Article 7 of the Child Pornography Prohibition Law, prohibiting minors (under 18) from producing or providing sexual images, with penalties up to 5 years imprisonment or fines. For juveniles, family courts prioritize rehabilitation via probation or counseling over incarceration.

Victim support involves counseling through child guidance centers. Broader probes check for additional victims or wider dissemination, amid rising youth sexting cases—Japan's National Police Agency reported 1,800+ child porn incidents in 2025, up 20% from prior years.

Broader Context: Scandals in Japanese High School Baseball

High school baseball (高校野球), epitomized by Koshien's grueling 50-game marathons, fosters intense senpai-kohai (upperclassman-underclassman) hierarchies prone to hazing (いじめ). Recent cases:

• 2025: Koryo HS withdraws from Koshien over senior bullying a junior.
• 2023: PL Gakuen effectively disbands post-violence scandals.
• 2019: Nihon U's university football scandal highlights pattern.

These expose cultural pressures: 99% of teams practice 30+ hours weekly, per JHSBF data, breeding entitlement among stars. University-affiliated programs amplify risks, as success translates to higher ed advantages.

Implications for Nihon University's Higher Education Reputation

In Japan's hyper-competitive higher ed landscape—1.3 million annual enrollees, 800 universities—scandals erode trust. Nihon U, known for comprehensive programs in law, medicine, and sports science, risks:

• Enrollment dips: Affiliated HS scandals correlate with 5-10% applicant drops (per 2019 data).
• Athlete recruitment: Top talents shun tainted pipelines.
• Funding scrutiny: Private unis depend on tuition; reputational hits cost millions.

Positive note: Proactive responses rebuild via ethics curricula. Explore career advice for academic roles amid such shifts.

Societal and Cultural Factors Fueling Misconduct

Japan's youth face digital pressures: 70% of teens use SNS daily (MIC 2025 survey), with sextortion rising. Club sports emphasize conformity, sidelining consent education. Cultural context—gaman (endurance) culture—delays reporting.

Stakeholder views: Experts like Prof. Hiroshi Tanaka (Waseda U) call for mandatory digital ethics in sports programs; parents demand coach accountability.

Potential Solutions and Preventive Measures

Universities like Nihon U can lead:

• Implement ethics workshops across affiliates.
• AI-monitored SNS for athletes.
• Partner with NGOs for consent training.

JHSBF reforms post-2025 scandals include anti-hazing audits. Higher ed benefits: Stronger brands attract global faculty and jobs.

Photo by Egor Myznik on Unsplash

Future Outlook for the Team and University

Spring tournaments loom; precedents suggest 1-2 year bans. Nihon U may audit all affiliates, positioning as reform leader. Long-term, this catalyzes healthier sports-higher ed integration.

Parents/students: Vet institutions via professor reviews and career resources. Institutions: Prioritize integrity for sustainable success. University jobs thrive on trusted brands; explore openings.