Bills of 10,000 yen (US$82; €60) and well-wishing notes have been discovered in municipal toilets across Japan, media reports said, baffling civil servants and triggering a nationwide hunt.

Is it estimated by the local media that over two million yen (US$16,400; €12,000) worth of bills were found at men’s rooms in city halls in at least 15 prefectures in recent weeks.