Because Japanese and China have different eating habits. Japanese lunch is cold, while China people are used to eating hot food. The tour guide is afraid that the tourists will suffer from diarrhea due to acclimatization. /kloc-at the end of 0/9, due to the development of railways, Japanese railway bento began to develop as a culture. Vendors put some lunch boxes in boxes and sell them at stations, just like vendors selling snack boxes at stations in China in the last century.

The difference is that there are only rice balls and pickles in the Japanese railway lunch. In the later period, the Japanese became more and more pursuing, and were no longer satisfied with the lunch with rice balls and pickles. So the railway bento sellers at various stations racked their brains and added various local characteristics or special dishes as dishes, but the main body of bento was cold food.

Different regions have different representative bentos. For example, the eel rice lunch in Miyajima. As mentioned earlier, railway lunches are all cold food, and eels, as marine fish, smell fishy when they are cold. But this kind of lunch in Miyajima has no smell at all. It is said that it tastes better when it is cold. As the most famous seafood producing area, Hokkaido is naturally inseparable from seafood. Among them, there is a squid lunch box, which skillfully fills the squid's stomach with rice, changes the shape of rice balls and makes them more delicious. Akita is a traditional chicken lunch. In addition, there are various shapes of lunch boxes, and rich people can even choose Shi Huailai to make lunch boxes.

But they are all cold, no matter fried chicken, seafood, stews and vegetables, they are all cold, which is a great test for China people who have been used to eating hot food since ancient times. People who are not used to cold food are likely to have diarrhea at first, which is why tour guides don't let tourists have lunch.