On the subject of money, in Japan there are a few widely-known and well-followed money superstitions that come from Chinese geomancy or Japanese tradition.
1. The cast-off skin of a snake. If you put the cast-off skin of a snake into your wallet, your wallet will be able to accumulate more money. This superstition has a long history and goes back to when snakeskins would often be seen in rural and mountain areas, since snakes moult as they grow. People would pick up these skins and take them home, then put them in their wallets as a money charm. Nowadays you can buy wallet-sized snakeskins in the shops.
2. Putting notes in your wallet upside down. Probably the most famous money superstition in Japan, the story goes that if you put a note upside down in your wallet, it will stay there.
3. Using a yellow wallet. This superstition comes from Chinese geomancy, in which yellow is the colour of happiness. So if you use a yellow wallet, it will attract more money.
4. Spring is the best time to buy a new wallet. Spring is haru (春) in Japanese, but haru (張る) also means ‘to fill’ or ‘to swell’. So So if you buy a new wallet in spring, your wallet will be full of money.
By Life in Kansai