≪The Unopened Door≫ Research Society Series

**≪The Unopened Door≫ Research Society Series** (《あかずの扉(とびら)》研究会(けんぎゅうかい)シリーズ, *≪Akazu no Tobira≫ Kengyūkai Shirīzu*) is a series of mystery novels written by Takumi Kirisha. It started being published by Kodansha in 1999 and concluded in 2001, with a total of four novels, which were later reprinted between 2003 and 2005. The first book, *Doppelganger Palace: ≪The Unopened Door≫ Research Society to the Ryuuhyoukan*, was the 12th winning work of the Mephisto Prize.

## Main Characters

See also: ≪The Unopened Door≫ Research Society Series/Characters (Contains Spoilers)

* **≪The Unopened Door≫ Research Society** (《あかずの扉(とびら)》研究会(けんぎゅうかい), *≪Akazu no Tobira≫ Kengyūkai*)**:** The main focus of the series. A club of Kitazawa Private University that solves various murders as they visit mysterious locations.
* **Satoru Godou** (後動(ごどう) 悟(さとる))**:** The founder and leader of the research society. A bespectacled man with a squared face. He originally started the ≪The Unopened Door≫ to gather materials for his graduation thesis, but he remains a member even after he graduated. Unlike Narumi, Godou never wants to get involved in the cases the group encounters, but he is always the one to ultimately solve the mystery.
* **Yuuichirou Narumi** (鳴海(なるみ) 雄一郎(ゆういちろう))**:** A self-proclaimed detective. He has black hair and wears fashionable clothing such as sunglasses and wingtip shoes. He is a fan of mystery novels, and has been reading books like *Offering to the Void* ever since he was young. He was formerly a part of the mystery novel study group, but the club disbanded after they encountered a murder at one of their travel destinations. Thus, Narumi joined ≪The Unopened Door≫. His reasoning abilities are second only to Satoru, but he doesn't envy him, the two having a strong relationship of trust. His favorite type of girl is someone younger than him, short and able to play the flute.
* **Jou Oomaeda** (大前田(おおまえだ) 丈(じょう), *Ōmaeda Jō*)**:** Also known as Joe Mae. A student in the architecture department, his father being a well known figure in the field. Jou has a fat physique, Kakeru referring to him as a "moomin with insomnia". He has the ability to open any lock, as well as many other unexpected skills. Kakeru believes he likes Yui, but he apparently has a lover named Tsukiko.
* **Sakie Mori** (森(もり) 咲枝(さきえ), *Mori Sakie*)**:** The bearer of "inspiration", something akin to a psychic power which lets her see people's future when she meets them. However, the visions she gets are often abstract and hard to make sense of. Kakeru admires her, falling for her at first sight; however, she seems to like Godou.
* **Hiromi Yui** (由井(ゆい) 広美(ひろみ), *Yui Hiromi*)**:** TBA
* **Kakeru Nihonmatsu** (二本松(にほんまつ) 翔(かける), *Nihonmatsu Kakeru*)**:** TBA

## Media

See also: ≪The Unopened Door≫ Research Society Series/Media

1. **Doppelganger Palace: ≪The Unopened Door≫ Research Society to Ryuuhyou Manor** (ドッペルゲンガー宮(みや‘)　《あかずの扉(とびら)》研究会流氷館(けんきゅうかいりゅうひょうかん)へ, *Dopperugengā Miya: ≪Akazu no Tobira≫ Kengyūkai Ryūhyōkan e*)
2. **Kaleidoscope Island: ≪The Unopened Door≫ Research Society to Taketori Island** (カレイドスコープ島(とう) 《あかずの扉(とびら)》研究会竹取島(けんきゅうかいたけどりしま)へ, *Kareidosukōpu Tō: ≪Akazu no Tobira≫ Kengyūkai Taketorijima e*)
3. **Ragnarok Cave: ≪The Unopened Door≫ Research Society to Kagerou Swamp** (ラグナロク洞(どう)　《あかずの扉(とびら)》研究会影郎沼(けんぎゅうかいかげろうぬま)へ, *Ragunaroku Dō: ≪Akazu no Tobira≫ Kengyūkai Kagerōnuma e*)
4. **Marionette Land: ≪The Unopened Door≫ Research Society to Kubitsuri Tower** (マリオネット園(こく)　《あかずの扉(とびら)》研究会首吊塔(けんぎゅうかいくびつりとう)へ, *Marionetto Koku: ≪Akazu no Tobira≫ Kengyūkai Kubitsuritō e*)