"Zankyosanka" is the opening song for the second cour of the Kimetsu no Yaiba anime's second season. The song is performed by Aimer, who has worked with ufotable before on other popular shows such as the Fate series.
Koe o karashite moeru hana no yō ni
Yamima o terashitara
Aimai sugiru sekai mo yorube ni shite
Yoru o kazoete asa o egaku yō na
Azayaka na ne o narasu
Don'na ni fukai kōkai mo
Don'na ni takai genkai mo