A [i][[Touken Ranbu]][/i] character. Based off of the [[tachi (weapon)|tachi]] [i]Mikazuki[/i] crafted by Sanjou Munechika currently housed in the Tokyo National Museum as a national treasure. One of the "Five Swords Under Heaven", along with [[Juzumaru Tsunetsugu]] and [[Oodenta Mitsuyo]].

In-game, he appears as a [[blue_hair|blue-haired]] young man with [[blue eyes]]. He wears a black [[hairband]] with golden [[tassel]]s, [[black gloves]] and a [[hakama skirt]] underneath a [[sayagata]] patterned [[kariginu]]. The crescent moon imagery invoked in his name (三日月 = Crescent Moon) is seen in his casual wear [[bandana]] and on the sides of his standard clothing.

Tends to be characterized as an "old man" in fanworks, since he introduces himself as an old man due to being "born" near the end of the 11th century. This either manifests in a wise, ancient personality or that of a doddering old fool in comedic works. For the most part he also tends to be characterized as a rather teasing person based on a few of his lines. Knows a thing or two about [[Honebami Toushirou]]'s past, but refuses to tell him anything about it.

He shares the same name as [[mikazuki (kancolle)|Mikazuki]]  from [i][[Kantai Collection]][/i] due to the historical ship being named after the sword, and as a result is often paired with her in various [[crossover]] fanart. Their grouping is tagged "三日月爺孫":http://dic.pixiv.net/a/%E4%B8%89%E6%97%A5%E6%9C%88%E7%88%BA%E5%AD%AB ("Mikazuki Grandfather-Daughter") in pixiv, as Mikazuki the sword spirit is a self-proclaimed old man (and thus the grandfather), while his ship-girl counterpart is a very young girl (hence the grand-daughter).

Because of his status as one of the hardest to obtain swords in the game, he's become rather infamous, and has appeared in multiple media as a borderline mascot for the franchise.

Voiced by Toriumi Kosuke. Character designer is [[ipev]].
三日月宗近(刀剣乱舞) 三日月宗近 みかつる 小狐三日 いちみか