Play word 灯火管制 灯火管制 とうかかんせい blackout (to prevent being seen by enemy aircraft during a nighttime air raid)
Play word おき火 おき火 おきび glowing ember (either red hot charcoal or the glowing remains of burnt firewood)
Play word お火焚 お火焚 おひたき Kyoto area festival held on the 11th lunar month (wherein bonfires are burned at shrines)