He sat on the Senate panel questioning LTC North after the Contra Affair. Apparently he took some sort of offense that North appeared (appropriately) in full uniform. Ollie North had medals up to his shoulder blade. Well, Inouye for some obscure reason showed up the next day in civilian clothing, but with all of his medals from WWII pinned to his business suit.
No, Inouye wasn't all there, used to be nicknamed "InNoWay,"