man born in the same zodiac year as the current year
Refers to a man whose Chinese zodiac sign matches the current year's sign. In Japan, such men often play a special role in New Year's or Setsubun celebrations, such as scattering beans. The term is culturally specific and does not have a direct English equivalent.
Since this year is the Year of the Tiger, he, as a man born in the same zodiac year, performed the bean-throwing ceremony.
Men born in the same zodiac year play the role of inviting good fortune during Setsubun.
Since he is this year's 年男, he was put in charge of scattering the beans.
On Setsubun, the 年男 scattered beans at the shrine.