The most economical export route from Yunnan to Japan (sea plus land), can you elaborate on it? Thank you!

It's best to find a company with a Japanese special line to send Yunnan to Japan, and the price is more favorable. I use a company to mail clothes to Japan. This company is called British Hailong. Everything was sent from Guangzhou after they received it for free. I told them to leave because it wouldn't be expensive. I asked several companies before I asked them to do it. This is the cheapest and the service is quite good. The customer service called back two days after the arrival of the goods, which was generally good. I recommend you to have a look.