Buy Panasonic shaver 11V 22V charging problem in Japan, or Nissan universal model.

1. The voltage in Japan is indeed different from that in China;

2. However, most razors now support international universal voltage. If your classmates are not clear, just ask or look at the outer packaging.

3. Your budget doesn't exceed that of 5 yuan, but in fact it's probably less than 4, yen. You can buy a very good razor in Japan at this price.

4. There are many brands of Panasonic in Japan, many of which are different from those of Guangdong Wanbao in China. In fact, they are all very easy to use, and Hitachi's razors are also good. Philips is also cheap to buy in Japan, and they are basically suitable for general voltage.