"Tachyon" is a song by mamenoi, a collaborative unit formed by composer MANYO (also known as Little Wing) and singer-songwriter yanaginagi. The track was originally released in 2012 as a standalone single and later included in yanaginagi's 10th anniversary selection album "-Roundabout-". It arrived in maimai as part of the GreeN PLUS expansion on July 17, 2014, and remained playable until its removal from arcade cabinets on December 15, 2016. The song's title references a tachyon, a hypothetical particle that travels faster than light, which is reflected in its urgent 176 BPM pulse and lyrical imagery of reaching across dimensions, searching for a connection through fragile signals. The arrangement is a full-band rock production featuring Shinichiro Fukuda on guitar, Yasuyuki Ishii on bass, and Masanori Yabuki on drums, with yanaginagi's signature clear, emotive vocals riding above the driving instrumentation. In maimai, the Master chart (level 11, designed by mai-Star) is notable for its dense Slide-note patterns, 131 out of 406 total notes, giving it a distinctive flowing, directional feel across the screen. The Expert chart was designed by Jack, while the lower difficulties carry no credited designer. Originally categorized under POPS in maimai GreeN PLUS through ORANGE PLUS, the song was reclassified as POPS & ANIME from the PiNK version onward.