Soushiki could refer to :
- Soushiki Zerozaki, the eldest brother of the Zerozaki Clan.
- Soushiki Zerozaki's Human Experiment, the first Ningen novel.
- Hitoshiki Zerozaki's Human Relations: Relations with Soushiki Zerozaki, the sixth Ningen novel.
- Soushiki Zerozaki's Human Experiment (Manga), a manga adaption of the first Ningen novel.
- Zerozaki Soushiki, chapter zero of the manga adaption.