In a general Japanese context, the word Karma
denotes unvirtuous deeds and unvirtuous effects, but this is not
accurate. Karma itself is neither virtuous nor unvirtuous. It simply
means that when all conditions are fulfilled, the cause brings forth
its effect. In other words, a virtuous cause brings about a virtuous
effect and an unvirtuous cause brings about an unvirtuous effect.
A cause that is neither virtuous nor unvirtuous brings about an
effect that is neither virtuous nor unvirtuous. This is Karma or
the law of cause and effect.
From Tathagata Abhidhamma,