Chup Kamuy is the Ainu luminary-deity, the kamuy of the heavenly lights: as tokap-cup 'the day luminary' she is the sun and as kunne-cup 'the night luminary' the moon. The dictionary of Batchelor records cup as the word for sun, moon and month alike. The classic aetiological narrative — that the moon-deity, unwilling to witness human wrongdoing in the dark, exchanged places with the sun — is recorded variously with the two luminaries as siblings (in the switch) and, in the modern tabulation, as the sun-goddess Tokapcup and the moon-god Kunnecup; the figure is authored here as the unified luminary-kamuy with no attested divine parent. Flagged SOLITARY: the sources give the sun/moon pairing as two aspects/partners of the one luminary rather than a kinship to the rest of the pantheon.