Students of Nippon Sports Science University rehearse for their annual synchronised walking performance, known as Shudankodo, in Yokohama on November 26, 2025. Their annual public display has in the past drawn crowds of more than 10,000, and viral clips online have introduced the routines to a global audience. (Photo by GREG BAKER / AFP via Getty Images)

Students of Nippon Sports Science University rehearse for their annual synchronised walking performance, known as Shudankodo, in Yokohama on November 26, 2025. Their annual public display has in the past drawn crowds of more than 10,000, and viral clips online have introduced the routines to a global audience. (Photo by GREG BAKER / AFP via Getty Images)

Students of Nippon Sports Science University rehearse for their annual synchronised walking performance, known as Shudankodo, in Yokohama on November 26, 2025. Their annual public display has in the past drawn crowds of more than 10,000, and viral clips online have introduced the routines to a global audience. (Photo by GREG BAKER / AFP via Getty Images)

Students of Nippon Sports Science University rehearse for their annual synchronised walking performance, known as Shudankodo, in Yokohama on November 26, 2025. Their annual public display has in the past drawn crowds of more than 10,000, and viral clips online have introduced the routines to a global audience. (Photo by GREG BAKER / AFP via Getty Images)

Students of Nippon Sports Science University chat during a break in rehearsals for their annual synchronised walking performance, known as Shudankodo, in Yokohama on November 26, 2025. Their annual public display has in the past drawn crowds of more than 10,000, and viral clips online have introduced the routines to a global audience. (Photo by GREG BAKER / AFP via Getty Images)

Students of Nippon Sports Science University rehearse for their annual synchronised walking performance, known as Shudankodo, in Yokohama on November 26, 2025. Their annual public display has in the past drawn crowds of more than 10,000, and viral clips online have introduced the routines to a global audience. (Photo by GREG BAKER / AFP via Getty Images)

Students of Nippon Sports Science University rehearse for their annual synchronised walking performance, known as Shudankodo, in Yokohama on November 26, 2025. Their annual public display has in the past drawn crowds of more than 10,000, and viral clips online have introduced the routines to a global audience. (Photo by GREG BAKER / AFP via Getty Images)

Students of Nippon Sports Science University rehearse for their annual synchronised walking performance, known as Shudankodo, in Yokohama on November 26, 2025. Their annual public display has in the past drawn crowds of more than 10,000, and viral clips online have introduced the routines to a global audience. (Photo by GREG BAKER / AFP via Getty Images)