YMMV / IOSYS

• Archive Panic: The circle has released over 300 CDs in various series (mostly Touhou Fan Music), so you'll be here for a while. However, its output has slowed down considerably as of The New '20s, so you at least have a chance to catch up.
• Awesome Music: Many of their hits are very, very liked.
• It's Popular, Now It Sucks!: While they are undoubtedly one of the most popular remix groups, there are those who hate what IOSYS do to the original songs, find their videos annoying, and consider them to be sell-outs for doing things like taking on commercial jobs and selling their CDs through Amazon.
• Memetic Mutation: All of their Touhou songs have become parodied on YouTube and Nico Nico Douga in Voice Clip Songs of things like the Japanese McDonald's commercials and Jack Black's appearance on Sesame Street.
• Misattributed Song:
  • Because of their status as the best-known Touhou remix group, expect the work of other Touhou remixers such as Silver Forest and Cool&Create to be misattributed to them, especially by the Western fandom.
  • On the flip side, because IOSYS does work with arrangers, lyricists, and vocalists from other circles and songs that they've worked on sometimes appear on other circles' CDs, there is occasionally a point of contention as to which circle the song should be considered belonging to (for example, "Mizuhashi Jealoussic Park", which originally appeared on ALiCE'S EMOTiON's Chaos Flare album and later on IOSYS's Touhou Ageha).
• Parody Displacement: Most people in the West are more familiar with the songs that make fun of the Touhou universe more than the original songs based on it. Those include the Cirno, Alice and Reisen's theme, respectively.
• Signature Song:
  • "Cirno's Perfect Math Class" and "Marisa Stole The Precious Thing" are two of their most well-known songs.
  • Among fans of DanceDanceRevolution, ARM's "ENDYMION" is infamous for being That One Boss.
• Tear Jerker: "Artificial Children" becomes quite sad when you realize it's about Alice wondering if her dolls have life or not.

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