You can take anything except milk. Japanese customs has made it clear that animal and plant specimens, meat and dairy products need to be quarantined (the shelf life has passed after quarantine).

The liquid must be thrown away during boarding security check.

When you pass through Japanese customs, you may be randomly selected. 90% won't, but every airport is different. Tokyo and Osaka are fine, and Kyushu found it once. In addition, at the baggage check-in office (behind the conveyor belt) at Osaka Airport in Tokyo, there will be drug dogs to check the luggage from time to time. If there is a problem, it will lie next to the box. In principle, drugs are inspected. If the meat you brought is not vacuum-packed, maybe the Japanese dog has never eaten China meat, and is squatting next to your box. After unpacking, most of your things are gone.

Try more local snacks and Japanese food when you are away from home. Because there are basically no authentic ones in China. In fact, the instant noodles and biscuits bought in 24-hour shops in Japan are not much more expensive than those in China. A bowl of instant noodles is only 7 yuan.