Mysterious band JIGSAW (ジグソウ) (ジグソウ) officially forms and announces its first live.
Mysterious character Tobiorikun (とびおりくん) contacts several news outlets with a message that “details will be revealed soon.”
Tobiorikun (とびおりくん) visits several CD shops to freely distribute a self-titled CD. Printed on the CD are the names of four musicians.
Also on the CD are several small white dots which, when connected, form the word JIGSAW (ジグソウ).
V: BUKIMI (ブキミ) / G: MARU (マル) / B: Tomoe (智依) / D: Shiki (詩季)
JIGSAW (ジグソウ) is officially revealed, and the band's first PV plays at Shinjuku (新宿) ALTA VISION (a large, outdoor television at a busy intersection).
Tobiorikun (とびおりくん) is revealed to be the band's mascot and changes his name to Ruzupokun (るずぱくん).
First live, free oneman * (<死垂桜ノ木ノ下デ。>*), is held at Meguro (目黒) ROCKMAYKAN. A CD is freely distributed to attendees.
Bassist Tomoe (智依) is fired due to his arrest for theft.
V: BUKIMI (ブキミ) / G: MARU (マル) / D: Shiki (詩季)
Bassist EMA (エマ) joins, although a new Twitter account announced that their picture would not be revealed (i.e. "not going to meet everyone") until January 1st, 2019
V: BUKIMI (ブキミ) / G: MARU (マル) / B: EMA (エマ) / D: Shiki (詩季)
Guitarist Maru pauses activities due to illness. As of January 21st, the illness was found to be stage 4 colorectal cancer. The band will continue under three members.