Akito's father is a business executive who works long hours and is seldom home. Although it seems in the beginning that he is a bad father, Mr. Hayama turns out to be a good father who was simply unaware of the bad relationship between his children because he was working too hard. After realizing Akito's suffering, and also becoming ill due to working too hard, he begins to spend more time at home. When Akito gets into various scrapes during the series, Mr. Hayama always believes in his son and supports him, even when no one else does. This could partially be attributed to the fact that he and Akito's mother were troublemakers in their younger years.
Mr. Hayama is very mellow and soft-spoken, but the few moments he breaks out of his quiet mode are very funny. He takes a great liking to Sana and develops a goofy habit of talking to the TV whenever she appears
From: Wikipedia.org
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