Aqua Bunko

Japanese: アクア文庫

Publisher: Oakla Shuppan

Links:

Official Site

Aqua Novels

Japanese: アクアノベルズ

Publisher: Oakla Shuppan (Okura Shuppan)

Arles Novels

Japanese: アルルノベルス

Publisher: One Two Magazine-Sha

Links:

Official Site

AZ Novels

Japanese: アズ・ノベルズ

Publisher: East Press

Links:

Official Site