Books in series

#1
Souichi's Diary of Delights; 双一の楽しい日記; Souichi no Tanoshi i Nikki
1998
Souichi's Diary of Delights is volume five in the Horror World of Junji Ito series. It was originally published in 1997.
The stories in this collection focus on Souichi Tsujii, a young boy who is obsessed with curses and the occult, much to the annoyance of his typical Japanese family. Souichi tends to not only make trouble for other people with his strange and mischievous behavior, but he also gets himself into hot water as well.
Collected stories:
Fun Summer Vacation
Fun Winter Vacation
Souichi's Diary of Delights
Souichi's Home Tutor
Mannequin Teachers
Souichi's Birthday

#2
Souichi's Diary of Curses; 双一の呪い日記; Sōichi no Noroi no Nikki
1997
Souichi's Diary of Curses is volume six in the Horror World of Junji Ito series.
It was originally published in Japan in 1997.
None of these stories have been officially published in English. But some have been translated by fans.
The stories in this collection focus on Tsujii Souichi, a young boy who is obsessed with curses and the occult, much to the annoyance of his typical Japanese family. Souichi tends to not only make trouble for other people with his strange and mischevious behavior, but he also gets himself into hot water as well.
\[CHAPTERS\]
01\. Souichi’s Selfish Curse
02\. The Silent Room
03\. The Coffin
04\. Rumours
05\. Fashion Model

#3
闇の声
2003
伊藤潤二の最新刊! 恐怖の裏に人間の哀しみがある。恐怖の裏に生きるおかしさがある。ホラー、ナンセンス、シュール――恐怖の名手が放つ新感覚のホラー連作! 恐怖があなたを追いかける。逃げろ! 逃げろ!! 逃げろ!!!

#4
New Voices in the Dark; 新・闇の声 潰談; Shin Yami no Koe Kaidan
2006
Chapters
Chapter 1: The Souichi Front
The story is a direct continuation of “Secret of the Haunted Mansion” from the first Yami no Koe.
Chapter 2: Souichi’s Beloved Pet
This story is about Soichi, the devilish boy that Ito has written about in a number of his other stories, and the events that unfold when his family adopts an abandoned cat.
Chapter 3: In The Valley of Mirrors
There is bitter enmity between two villages, facing each other across a river. But instead of erecting walls and battlements, they both decided to put up mirrors. What could this mean? And where did all the people disappear to, all those years ago?
Chapter 4: Anything but a Ghost
While driving on a mountain road one night, Shigeru finds a girl covered in blood.
Chapter 5: Library of Illusions
Koko lives with her husband Goro in a giant mansion full of books. The books are a family heirloom, and he’s fiercely protective of them, so it would really suck if something were to happen to them…
Chapter 6: Songs in the Dark
Ever had a song stuck in your head? Of course you have, there’s probably one there now. But what if it didn’t go away? Days, weeks, months, the same song 24/7.
Chapter 7: Splatter Film
A bunch of stoned slackers get hooked on delicious honey, with delicious results.
鬼才・伊藤潤二が恐怖の果ての戦(おのの)きを描く“シリーズ闇の声”、第2弾!! 恐怖、憤怒、悲哀、戦慄――人間心理の襞を余す所なく活写する、魅力的なアンソロジー!! 絶望と哀しみとブラックな笑いが織り成す様々な人生模様。「双一前線」「双一の愛玩動物」「合鏡谷にて」「幽霊になりたくない」「蔵書幻影」「闇の絶唱」「潰談」収録。