Noun
burglary (while occupants are present); burglar (of a house where occupants are present)
see 空き巣
彼は居空きとして知られ、日中でも家に忍び込んで貴重品を盗むことで評判となっていた。He was known as a burglar of houses where occupants are present and had a reputation for sneaking in and stealing valuables even during the day.
Also written 居あき【いあき】