Franchise: Touhou Project

In 2014, Beijing Forestry University student Xu Wan submitted an application for the recognition of a new cultivar of the crape myrtle species Lagerstroemia indica named Lingmeng. The name was derived from Touhou Project protagonist Reimu Hakurei at the suggestion of her friend Li Yaolin, who was a fan of the games and noticed similarities between the cultivar's petals and Reimu's signature bow. "Lingmeng" is the Chinese reading of the kanji in Reimu's given name, 霊夢 (rendered as 灵梦 in simplified Chinese). Xu's application was accepted in 2017, though it didn't receive widespread attention until the following year, when it caught the attention of Touhou fans and general ACG fans on the Chinese internet.

The four fighting games of the Touhou Project are co-developed by doujin circle Twilight Frontier/Tasogare Frontier, who have also developed several fangames for Touhou Project.

The characters Reimu Hakurei and Yuyuko Saigyouji appear in Square Enix's game LORD of VERMILION Re:2 as guest characters. The flavor text for both the characters' cards was written by ZUN.

Despite being the main character of the series, Reimu Hakurei does not appear on the icon of any main-series Touhou games for Windows. The main games' icons instead depict Marisa Kirisame. This includes the icon for the spin-off Shoot The Bullet, a game where Marisa isn't playable.

In October of 2010, Guiness World Records had recognized Touhou Project as the world's most prolific "fan-made shooter series."