Japanese Iris Authentication:

Tokyo line and Oedo line are both acceptable, and the cost in Osaka should be within half of Tokyo's.
Preparation before departure: 1. Passport and visa (the threshold is very low, you can directly search for Ctrip on Taobao for visa application). 2. Make a bank appointment to exchange some Japanese yen, around 5000-10000 should be enough, most places accept our quick payment methods. 3. If you have an iPhone, you can directly register for a Suika card, which is more convenient. 4. Apply for a Japanese SIM card on Taobao, and insert it and turn on your phone upon arrival. 5. Download Google Maps (it is very useful and can solve most problems).
Tokyo Line: You can fly to Tokyo and stay in Ikebukuro, Otsuka. There is a WLD store in Ikebukuro Kudi Coffee where the staff is a young man from Xinjiang who can communicate in Mandarin. There are also many Chinese people in other stores. The housing prices here are relatively cheaper, usually ranging from 500-1500 RMB in general. There are many convenience stores in Japan, just like our pharmacies... After registering, you can stroll around Tokyo. Accommodation generally needs to be booked in advance, and it is generally impossible to stay on the same day... Check-in is usually after 3 pm, and check-out in the morning is usually 10-11 am. Everyone should check the hotel information and avoid unnecessary trouble.
Osaka Line: Friends flying to Osaka can stay near Shinsaibashi, which is a commercial street with several wld registration points nearby. There are many Chinese people in Osaka, so don't communicate too much and don't trust others too much when going out... Get your registration done and then have a good time on the commercial street. The price of spa in Osaka is also half of that in Tokyo [hmph]. Accommodation ranges from 300 to 800... It's up to the individual, but overall, it's half as cheap as Tokyo.
Friendly reminder: Everything else is not a problem, but if you take the subway, pay attention to the transfer issue. Google Maps also provides reminders. Other obstacles are not significant... Many times, you need to get off and then get on at the same location. It just takes a few times to adapt.
Wish you all a happy journey [可爱] [打call]