関かん係けい当とう事じ者しゃ殿どのMeaningsExpression1. to whom it may concernKanji used関connected to係be involved with当hit (the target)事occurence者someone殿palaceComposed of関かん係けいrelation; relationship; connection; participation; involvement; concern; influence; effect; sexual relations; sexual relationship; …Noun当とう事じ者しゃperson concerned; interested party; related partyNoun殿どのMr.; Mrs.; Miss; Ms.Suffix