If you're looking for manga similar to Touhou Gumonshiki: Memorizable Gensokyo, you might like these titles.
Every October, Masaka and her parents visit her grandparent’s house, and each year, they bring a small orange pumpkin with them. What Masaka looks forward to most is meeting her relative called Isuke. Masaka has a crush on Isuke and wishes she could play with him much more than just once a year. However, unknown to Masaka, there is a secret to Isuke and the pumpkin they bring each year.
Continuing in the Touhou series, this one follows the footsteps of Silent Sinner in Blue, Inaba of the Moon & Inaba of the Earth, and the Sangetsusei trilogy. This time, Marisa comes across a mysterious hermit outside the Human Village. However, as she tells Reimu about her, the hermit is seen sneaking around the Hakurei Shrine. She's Ibara Kasen, a strange, bandaged ascetic of unknown nature and ability who's far more aware of them and Gensoukyou than either realizes.
Follows the efforts of Reimu Hakurei, Marisa Kirisame, and the residents of the Scarlet Devil Mansion as they attempt to send a rocket to the moon, purportedly in order to invade the Lunar Capital.
Miyoi works at Geidontei, a izakaya pub in a remote part of the fantasy land, Gensokyo. As a postergirl, she is worried about a rumor that some of their customers have disappeared, and that a ghoul has kidnapped them. Reimu, a priestess of Hakurei Shrine, sets out to investigate the case - what is behind all this?
Includes the following chapters:
Each story is told from the perspective of Rinnosuke Morichika, proprietor of the curio store Kourindou. Naturally, he has a lot of well-known "customers" in the store, especially Reimu Hakurei and Marisa Kirisame.