Satame ga kieta? Hikaru no go : Season 1 Episode 61

The time has come for Sai to leave has come, leaving Hikaru angry and frustrated. He goes back to his Grandfather's attic and discovers that the Blood-stained Go board, where Sai's spirit once resided, is now clean. In his quest to find Sai, Hikaru takes off for Innoshima, where Sai first appeared to Torajiro, the young man who later became the great Hon'inbo Shusaku.