Overview
Session High⤴ is the theme song of the third story arc of Irodorimidori Season 1, "試練の三送会編" (Trial Farewell Party Arc), a seven-girl vocal unit franchise that spans multiple SEGA rhythm games. Composed, arranged, and lyricized by Ryohei Sataka (y0c1e) of Hifumi,inc., the track is an exuberant pop anthem at 200 BPM sung by all seven Irodorimidori members, each voiced by a different actress, with lyrics built around the imagery of seven distinct melodies converging into a single harmonious "session." The song originally debuted in CHUNITHM STAR on December 19, 2017, before crossing over to maimai as part of the CHUNITHM collaboration lineup in MiLK PLUS on June 21, 2018. In maimai でらっくす PLUS, its in-game genre category was migrated from ORIGINAL to オンゲキ＆CHUNITHM, reflecting the broader cross-franchise branding. Its Master chart, designed by すきやき奉行 (Sukiyaki Bugyou) at Level 12+ (constant 12.8), is a high-speed barrage of 536 notes that places heavy demand on slide accuracy and break-note timing, making it a staple endurance test in the collab song roster. Asian English releases retitle the track as "Session High!!" with the artist credit romanized as IRODORIMIDORI.
Videos
Charts
STD
BASIC
6(6)
182 notesDesigner: -|Tap 164Hold 9Slide 4Break 5
ADVANCED
7+(7.6)
254 notesDesigner: -|Tap 211Hold 21Slide 14Break 8
EXPERT
10+(10.6)
377 notesDesigner: サファ太|Tap 277Hold 43Slide 29Break 28
MASTER
12+(12.8)
536 notesDesigner: すきやき奉行|Tap 390Hold 20Slide 79Break 47
Trivia
- Session High⤴ serves as the theme song for the third story arc of Irodorimidori Season 1, titled "試練の三送会編" (Trial Farewell Party Arc).
- The song was composed, arranged, and written by Ryohei Sataka (y0c1e) of Hifumi,inc., a composer known for numerous Irodorimidori vocal tracks across CHUNITHM, maimai, andオンゲキ.
- All seven Irodorimidori members perform on this track: Serina Akesaka (CV: Emi Nitta), Aliciana Ogata (CV: Ayaka Fukuhara), Nazuna Tennouzu (CV: Ayano Yamamoto), Nagi Kobotoke (CV: Kaoru Sakura), Naru Hakobe (CV: M・A・O), Nachi Tsukisuzu (CV: Ayaka Imamura), and Shirona Tsukisuzu (CV: Marika Kouno).
- Session High⤴ first appeared in CHUNITHM STAR on December 19, 2017, roughly six months before its maimai debut in MiLK PLUS on June 21, 2018.
- In maimai でらっくす PLUS, the song's genre was changed from ORIGINAL to オンゲキ＆CHUNITHM, aligning it with the broader SEGA rhythm-game crossover category alongside songs from CHUNITHM and オンゲキ.
- In Asian English versions of maimai, the title is displayed as "Session High!!" and the artist credit as "IRODORIMIDORI."
- The Master chart by すきやき奉行 is one of the few 12+ charts in the MiLK PLUS era, containing 79 Slide notes and 47 Break notes among its 536 total, a dense pattern load at 200 BPM.
- The song has undergone multiple difficulty level revisions across maimai versions: its Master chart started at 11+ in MiLK PLUS, rose to 12 in Splash, and settled at 12+ from UNiVERSE PLUS onward.
- The Expert chart was designed by サファ太 (Safata), another regular maimai chart contributor known for technical note layouts.
- The song runs 1 minute and 33 seconds, a compact duration typical of rhythm-game original vocal tracks.
- The lyrics open with "ありがとう！！ ７つのメロディー 奏でたいでしょ" (Thank you!! Seven melodies, you want to play them, don't you?), directly referencing the seven-member Irodorimidori cast.
- In the MiLK PLUS era, exclusive collection titles, the arrow icon "⤴" and the frame "Session High⤴", were obtainable by achieving MASTER rank or All Perfect on the chart, though these are no longer earnable in でらっくす versions onward.
FAQ
- Who composed Session High⤴?
- The song was composed, arranged, and written by Ryohei Sataka (y0c1e) of Hifumi,inc., a frequent contributor to the Irodorimidori song catalog across SEGA's rhythm game franchises.
- Who are the vocalists on Session High⤴?
- All seven Irodorimidori members sing on the track: Serina Akesaka (CV: Emi Nitta), Aliciana Ogata (CV: Ayaka Fukuhara), Nazuna Tennouzu (CV: Ayano Yamamoto), Nagi Kobotoke (CV: Kaoru Sakura), Naru Hakobe (CV: M・A・O), Nachi Tsukisuzu (CV: Ayaka Imamura), and Shirona Tsukisuzu (CV: Marika Kouno).
- What maimai version added Session High⤴?
- Session High⤴ was added to maimai on June 21, 2018, as part of the MiLK PLUS update.
- What difficulty is Session High⤴ on Master in maimai?
- The Master chart is Level 12+ with a difficulty constant of 12.8. It contains 536 notes (390 Tap, 20 Hold, 79 Slide, 47 Break) and was designed by すきやき奉行 (Sukiyaki Bugyou).
- Who designed the Expert chart for Session High⤴ in maimai?
- The Expert chart (Level 10+, constant 10.6) was designed by サファ太 (Safata).
- Where did Session High⤴ originally debut before maimai?
- Session High⤴ first appeared in CHUNITHM STAR on December 19, 2017, about six months before its maimai debut.
- What is the song Session High⤴ about?
- Session High⤴ is the theme song of the third story arc of Irodorimidori Season 1, "試練の三送会編" (Trial Farewell Party Arc). The lyrics celebrate seven distinct melodies (representing the seven Irodorimidori members) coming together in harmony to create a shared musical session.
- What genre is Session High⤴ classified under in maimai?
- It originally debuted under the ORIGINAL & JOYPOLIS genre in MiLK PLUS. Starting from maimai でらっくす PLUS, it was moved to オンゲキ＆CHUNITHM (Ongeki & CHUNITHM), the crossover category for songs from those two SEGA rhythm games.
External Links
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