(Mods, if this isn't allowed feel free to delete this post)
Shimamiya Eiko announced that she was diagnosed with thyroid cancer in early May. Her condition is reportedly not life-threatening but on the recommendation of her doctors, her professional activities have been put on hold. Cancellation of her live concert that was scheduled for June 10 was also announced.
Shimamiya has been giving updates regarding her treatments on her twitter. In a tweet in late May, she revealed that there is a possibility after surgery she will no longer be able to use high pitches.
They're accepting messages for Shimamiya at I've Sound Explorer: Message Form
Japanese, English, Chinese, Spanish, whatever language, I'm sure any message giving her support and wishing her the best will be appreciated :D
Twitter post informing of diagnosis
Shimamiya Eiko Official Site on Geneon Entertainment
Perfect World Special Site
I've Official Site
I've Official English Site
I've Sound Blog Article
Anime News Network Article
Anime Raku Article
The Banzai Effect Article
x-posted ive_sound, ivesoundudont, higurashi_fans, oyashirosama