Yomawari is getting a sequel called Shin Yomawari in Japan and elsewhere as Yomawari: Midnight Shadows. The game will be out on PS4, PSVita and PC in the fall. The only info we have about it aside from a screenshot is this:
"The follow-up to 2016’s cult horror hit Yomawari: Night Alone, Yomawari: Midnight Shadows introduces two brand-new girls, Yui and Haru, to the night and the spirits who haunt it. Separated by a mysterious attacker, each girl will explore haunting and bizarre locations, face the terrors of the night, and test their courage and wits to survive and reconnect with one another."http://gematsu.com/2017/04/yomawari-midnight-shadows-coming-west-ps4-ps-vita-pc-fall#vYtjVm5dMug28fdY.99
It's also been mentioned that the world will be twice as big as the first game's world. There's no trailer yet, but we should be seeing one at E3.