Bloodshot Mode Akaya.
A state that Kirihara enters when he is under high pressure, injured, or pushed to the point of anger in a match. The whites of his eyes turn red, and his power, skill, and speed increase. In this mode, Kirihara will aim towards the opponent's body; his shots becoming faster and more powerful.
In the manga, Kirihara appears to only injure his opponent as necessary to make sure they do not win, not out of thoughtless malice. For example against Shusuke Fuji, once succeeding in blinding him, the only further shots at Fuji's body we see are extremely little and merely 'teasing' hits.
Kirihara in Bloodshot Mode.
Kippei Tachibana was also entirely well enough to participate in the match for Third Place in the Kantō Finals against Rokkaku (merely a week after he suffered his injuries from Kirihara).
In the anime, Kirihara often licks his lips in this mode, which shows that he loves what he is doing - a trait never shown in the manga, where his play simply becomes more aggressive and more violently-inclined. In contrast to the manga, Kirihara will go out of his way to hurt his opponents and continue doing so even if it may seem as though his win is assured.