Under the Cap: Hidden Stories
POCARI SWEAT revealed the private words high schoolers write under their caps, turning Koshien's scores into personal stories.
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AI Translation Summary
For Koshien, Japan's century-old high school baseball tournament, POCARI SWEAT looked past scores and uniforms to the individuals inside the game. It surfaced the private messages players write under their caps — dreams, fears, promises — through a brand film, a 14-day newspaper run, and OOH at Umeda Station. The work reframed a national ritual around the person, not just the result.
Cultural Context
Koshien is Japan's national high school baseball championship, held every summer for over a century and treated as a rite of passage; many players inscribe private words inside the brim of their caps as personal vows. Umeda Station in Osaka is one of Japan's busiest commuter hubs.
Entry Information
Summary
Under the Cap turned Koshien from a tournament of scores into a story of the young people inside the game. Every summer, Japan watches Koshien, its century-old ritual and the country's biggest stage for high school baseball. But players are often seen through teams, uniforms and results, leaving little room for the individual. POCARI SWEAT revealed what fans rarely see: the private words players write under their caps before stepping onto the field. The campaign began on Koshien’s opening day with an online brand film celebrating the individuality hidden beneath every cap, then extended into the media moments fans naturally followed throughout the tournament.
Strategy
Sports culture often celebrates what is visible: victory, loss, discipline, teamwork and hero moments. But for high school athletes, the emotional weight of the game is often carried silently. POCARI SWEAT's long-standing support of high school baseball gave the brand permission to reframe the sport without rejecting its traditions. The strategy was to expand the fan gaze from the scoreboard to each player’s individuality: the private motivations, personalities and hopes that made every player different.
Execution
The execution used authentic sports artifacts as the storytelling medium. Real caps were collected from players across Japan, each carrying a different handwritten voice under the brim — dreams, fears, goals, promises — no two alike. This diversity of inner words became the emotional center of the online brand film launched on opening day. The same messages then appeared for 14 consecutive tournament days beside daily Koshien results in a national newspaper, with multiple caps and voices revealed each day. A large-scale OOH placement at Umeda Station intercepted fans and commuters on a key route connected to the tournament, while social content carried the stories into broader fan conversation.
Results
The campaign shifted the sports conversation from only "who won" to "what each player carries." The opening-day online brand film generated 12.8 million views across YouTube, Instagram and TikTok. The 14-day newspaper execution reached 3.4 million daily readers, generating approximately 49 million cumulative reader contacts. The Umeda OOH reached an estimated 460,000 commuters per day, and related social content reached 16.96 million impressions worldwide with earned media coverage. Fan and parent reactions showed the work added a new way to experience Koshien: not as anonymous teams in identical uniforms, but as individuals under pressure, ambition and hope. POCARI SWEAT changed what a nation celebrates in its century-old sporting tradition.