Kaizumi Tsugutoshi

Kaizumi Tsugutoshi is a minor character in the Toaru Majutsu no Index series. He is one of the twelve people on Academy City's Board of Directors.

SS Volume 2
He is known as the one responsible for the plan to have all the Gemstones taken into Academy City, after being advised to do so by Kumokawa Seria. He is also the head of all research done on the Gemstones. Described as an old man who looks at the Gemstones as more than just research material but is too soft to do anything for them when he could have avoided all the trouble in SS2 in the first place by taking them all to Academy City, saying that they have their own lives to live and that they shouldn't be disturbed. Also described as "naive" by Seria, when Kaizumi wants to get into unnecessary troubles by taking in the Gemstones when there's absolutely no way any researcher outside Academy City is capable of unlocking their secrets before they die.

NT Volume 7
Kaizumi is tortured by Tsuchimikado Motoharu becuase he falsely believes that Kaizumi is the person in charge of the agitate halation project. Kaizumi was actually trying to stop the agitate project the whole time, but he comments that Tsuchimikado wouldn't what he said anyway. He also figures out the truth about Tsuchimikado's real actions and the meaning behind his resolve for revenge. Kaizumi is eventually knocked out by Tsuchimikado who hits him in the head with a gun.

Personality
From NT 7:

Kaizumi normally does not drink alcohol. Hoewver, this is not a result of a belief in moderation. Rather this is a result of his belief that alcohol, tobacco, and other things that (he believed) dulled the senses would only diminish his enjoyment. He enjoyed music, theatre, antiques, and fine arts. He had even bought a horse and could picture the corresponding scenes in his mind when reading a train schedule or historic dates.

He preferred to enjoy his limited free time to its fullest during his long lifetime. You could even call that the principles the old man lived by.

The only time he does drink is when he is stressed, during the most unpleasant of times.