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Most of you will say Kirigaya, but that is his adopted family name. Kazuto's
mother was Midori's sister and was married to a man from a different family.


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2019-06-07T23:04:51.643
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2020-04-05T03:34:47.167
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sword-art-online
What was Kirito's actual family name?


Per [the fan wiki](https://swordartonline.fandom.com/wiki/Kirigaya_Kazuto),
his surname was Narusaka (鳴坂) prior to his adoption.

> Born on October 7, 2008, Narusaka Kazuto was adopted by his aunt and uncle a
> year after his birth, when his biological parents died in an accident.

According to [this news
article](https://www.monstersandcritics.com/anime/sword-art-online-
season-4-release-date-sao-unital-ring-light-novels-the-sequel-to-the-four-
cour-alicization-anime-spoilers/) and some other sources I found, this was
revealed at the beginning of _Unital Ring_ , originally in [the January 2018
issue](https://twitter.com/sao_wikia/status/939465711772209152) of Dengeki
Bunko, which publishes SAO as a serialized story.


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