The reason Baekje and Silla couldn't beat Japan.

 In Japan, the topography and surrounding currents are natural fortresses, so foreign enemies can never invade. It's because there's a problem with the ocean currents and the entrance is long and narrow.Anyway, I was saying that I would fail out of ten. According to the literature, while describing the shape of the Japanese archipelago in detail... I was explaining it, and it seemed plausible.Hae-ja, who has the power to make a valid argument, should take a closer look at the map. On the other hand, Japan has a natural environment that is easy to invade the Korean Peninsula. It is said that the Japanese of the archipelago can reach the coast of the Korean Peninsula in a short time by sea currents. In particular, it is said that the Gyeongsang-do area can be unprotected because it is difficult to guard Japanese enemies.   Don't simply infer that Baekje and Silla couldn't invade the archipelago due to the difference in military power and that the Japanese crossed the sea and invaded the coast of the Korean Peninsula...Consider various factors such as topography and ocean currents. I remember that there was a part in the Samguksagi where when the Japanese ran wild, the King of Silla considered conquering 를 across the sea, but dissuaded the bookkeeper that it was never an advantageous scheme.   Now I'm going to talk about something else. Can you say that the Japanese in the Samguksagi specifically refer to the Japanese in the archipelago? I found it while searching through Sohae-i's national station book. I got it, so read it. If you feel the pressure of the length, you can just read the last paragraph. Volume 2 of Gyeongseyupyo, Chugwan Hyeongjo, 5th Hyeonggwan Persistence, There are only several islands in the southwest sea, of which the large one is 100 ri in circumference and the small one is the 40 to 50 ri. There are many stars and Go eggs, and there are about 1,000 small and large ones stuck together, which is the outer fence of the country. However, since the opening of the country, the royal court has sent envoys early to rule over this river soil. Therefore, each of the coastal villages worked on their own and attached them to each other, taking up a lot of the strong and less of the weak. A pile of green mountains is clearly in front of this village, and when asked about the village to which it belongs, it is said that a very distant village outside hundreds of ri has jurisdiction over it. In addition, the name was subordinated to the village, but in fact, it was tied elsewhere, so the palace went to the D-009 year old, or the county gate became D-010 year old, or the county Toho carried Gong or made a management system. The place where Jin and Bo were located was tied to Suyeong, and the place where the villa was located was tied to Management, but the simple act came from all directions and arbitrarily searched the people. In this way, even if you try to appeal to the village, it takes 10 days to get there due to the rough wind, or it is difficult for Sammunju D-011 to work as it is blocked by the children. For this reason, all the people of the Haedo Island regard the Bugul as sweet, even if they feel sorry and unfair, and do not swear to enter the government office. Once all fishing grounds or salt fields have been washed, they cannot escape even if Changsangju D-012 has changed several times, and even if they have been washed once, they cannot be missed even if the owner has changed several times. Even if a person is killed while fighting, he or she is dead, and when a bad harvest occurs, he or she leads his or her wife to Japan and saves his or her life by saying that he or she was a false drifted man, and when the thief reached his or her own weapon and style, he or she refuses to make adjustment orders. This has usually existed since Silla and Goryeo, so its origin is long. Since I have been on the beach for a long time, I learned the situation well. What do you think, Haejja?  Until Silla, Goryeo, and Joseon Dynasty, the people of Hado Island went to Japan to live in the event of a famine and were left unattended in the coffin.  This is the case in the Joseon Dynasty, and during the Three Kingdoms Period, the people of the Hado Island also crossed the islands and lived in harmony with the humans there, so they were Japanese.