Chikai (Eiko Shimamiya song)

"Chikai"
Single by Eiko Shimamiya
B-side"OXISOLS"
ReleasedApril 8, 2009
GenreJ-Pop
Length19:44
LabelFrontier Works
SongwritersTomoyuki Nakazawa, Eiko Shimamiya
ProducerI've Sound
Eiko Shimamiya singles chronology
"Wheel of Fortune"
(2007)
"Chikai"
(2009)
"Super Scription of Data"
(2009)

"Chikai" (誓い; "Vow") is Eiko Shimamiya's fourth single produced by I've Sound and Geneon Entertainment label. It is set to be released on April 8, 2009, a year after releasing her third single "Wheel of Fortune". The title track is used as the opening theme for Higurashi no Naku Koro ni Chikai (ひぐらしのなく頃に誓), the live-action film sequel for the first Higurashi no Naku Koro ni live-action film.

The single's catalog number is FCCJ-0003 for the regular CD-only edition since it won't be having a limited CD+DVD edition. Overall, this will be Shimamiya's fourth tie-in with the Higurashi no Naku Koro ni series.