Subterranean Animism's name is misspelled as "Aminism" during the Staff roll scenes.
seen from United States
seen from Finland
seen from Lithuania

seen from Finland
seen from United States

seen from United States
seen from Russia
seen from Lithuania
seen from United States
seen from France

seen from United States

seen from United States
seen from Bangladesh
seen from China
seen from United States
seen from United States

seen from United States
seen from France
seen from United States
seen from United States
Subterranean Animism's name is misspelled as "Aminism" during the Staff roll scenes.

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
Free to watch • No registration required • HD streaming
The dialogue box doesn't disappear from the screen during Orin's transformation in Subterranean Animism. This happens on all routes.
The message that appears when trying to listen to a locked track in the Music Room is the same since Mountain of Faith. However, since Undefined Fantastic Object, it was slightly improved (a comma was added in the second to last row and a fullstop was added at the end of the last two rows).
Locked and unlocked Music Room from Subterranean Animism in the trials (left side) and full version (right side).
All digits are closer to the "No." in the trial versions.
When you look at Utsuho Reiuji's and Keiki Haniyasushin's spellcard backgrounds there doesn't seem to be anything in common.
But one of Keiki's background textures can be found on Utsuho's.
In Keiki's case, the texture is so distorted in-game that's impossible to notice it with the naked eye. It's noticeable if you look into the game files.

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
Free to watch • No registration required • HD streaming
Parsee Mizuhashi's spellcard background contains a green texture and a red one. In Subterranean Animism, the green texture is more visible, while in Double Spoiler the red one is instead.
In Subterranean Animism, after the "Caution!!" message appears on Utsuho's last spellcard (and you start being pulled by the gravitational force of the sun), your options will switch positions instantly when you focus or unfocus. This applies to Reimu A, B, C and Marisa C.
In case of Marisa A, the dolls will stop coming towards her when switching between focus and unfocus.
Kisume and Yamame Kurodani have the same spellcard background.