Kaijin Nijuu Mensou (怪人二十面奏) forms in Osaka (大阪)大阪.
The band refers to periods within their history as "Chapters." Atarting from their formation, until April 16, 2017, is called Dai-Isshou Kaijin Nijuu Mensou San Jouhen (第一章 怪人二十面奏参上篇)
First oneman is held
Second oneman is held
Third oneman is held
Chapter 2, Dai-ni Shou Dennou Kowloon Toride Hen (第二章 電脳九龍城砦篇) begins
Birthday oneman is held for guitarist KEN
20 yen oneman is held
Oneman is held
Chapter 3 Dai-sanshou Yami Dainippon Teikoku-Roku- Hen (第三章 闇大日本帝國-陸-篇)
Oneman is held
Oneman is held
Oneman is held
Acoustic oneman is held
4th chapter Dai-yonshou Jigoku Bungou Shounen Hen (第四章 地獄文豪少年篇) begins
Oneman is held
Oneman is held
20 yen oneman is held
20 yen oneman is held
5th chapter Dai-goshou Yami Dainippon Teikoku-Umi- Hen (第五章 闇大日本帝國-海-篇) begins
Oneman is held
6th chapter Dai-rokushou Mato Shanhai Hen (第六章 魔都上海篇)
Oneman is held
Oneman is held
Oneman is held
Oneman is held
Oneman is held
Oneman is held
Chapter 7 Dai-nanashou Kugutsu ANTIQUE Hen (第七章 傀儡アンティーク篇) begins
Oneman
music labs
Oneman is held
Oneman is held
Oneman is held
Oneman is held
Oneman is held
ネオ・シュルレアリスム (NEO SURREALISM) tour begins
Oneman is held
Chapter 8 Dai-hasshou Taishou 108 Nen, Teito Metsubou Hen (第八章 大正一〇八年、帝都滅亡篇)
Oneman is held
Oneman is held
ネオ・シュルレアリスム (NEO SURREALISM) tour ends and tour final oneman is held
Oneman Ura Gen'ei Tengoku (裏幻翳天國) is held
Billed for participating KANSAI ROCK SUMMIT'21 EXPLOSION CIRCUIT VOL.8 event, but due to COVID-19 restrictions, this event gets cancelled
The Number Twenty -REVENGE- Tour begins
The Number Twenty -REVENGE- Tour ends