How to prepare for a trip to Japan during the Spring Festival and how to prepare money?

1, Japan is closest to China, and the weather in Tokyo, Nagoya and Osaka is similar to that in Shanghai. Because of traveling, I am active every day, so it won't be too cold. Hotels and cars are air-conditioned, so don't wear too many clothes. Spring Festival and Tokyo are cloudy. All international airports, big banks and restaurants in Japan have foreign exchange business, but the business hours of the exchange business at the bank window are from 9 am to 3 pm. US dollars, British pounds, French francs, Hong Kong dollars and other foreign currencies can be exchanged in Japan, and there are few RMB exchange outlets. Suggestion-A. UnionPay cards issued by China can be used in Japan. China UnionPay card has signed contracts with thousands of franchise stores in Japan. All debit cards that join UnionPay card can be paid directly in Japan without exchange, which is very convenient. Shopping, catering, accommodation and ticket purchase can be used in major tourism-related commercial facilities with UnionPay card logo. B, if you bring cash, change RMB into US dollars in China and Japanese yen in Japan. 3. The voltage in Japan is 100 V, so you can't directly charge the camera and other electrical appliances brought by China in Japan. If you want to use it, you need to prepare a transformer from 220V to100 V.