It was during the reign of Suinin, if Japanese chronology be accepted, that notices of Japan began to appear in Chinese history--a history which justly claims to be reliable from 145 B.C. Under the Later Han dynasty (A.D. 25-220), great progress was made in literature and art by the people of the Middle Kingdom, and this progress naturally extended, not only to Korea, which had been conquered by the Chinese sovereign, Wu-Ti, in the second century before Christ and was still partly under the rule of Chinese governors, but also to the maritime regions of Japan, whence the shores of Korea were almost within sight. China in those ages was incomparably the greatest and most enlightened country in the Orient, and it had become the custom with adjacent States to send emissaries to her Court, bearing gifts which she handsomely requited; so that while, from one point of view, the envoys might be regarded as tribute-carriers, from another, the ceremony presented the character of a mere interchange of neighbourly civilities. In Japan, again, administrative centralization was still imperfect. Some of the local magnates had not yet been brought fully under the sway of the Yamato invaders, and some, as scions of the Imperial family, arrogated a considerable measure of independence. Thus it resulted that several of these provincial dukes--or "kings," as not a few of them were called--maintained relations with Korea, and through her despatched tribute missions to the Chinese Court from time to time. In these circumstances it is not surprising to find the Chinese historians of the first century A.D. writing: "The Wa (Japanese) dwell southeast of Han* (Korea) on a mountainous island in midocean. Their country is divided into more than one hundred provinces. Since the time when Wu-Ti (140-86 B.C.) overthrew Korea, they (the Japanese) have communicated with the Han (Korean) authorities by means of a postal service. There are thirty-two provinces which do so, all of which style their rulers 'kings' who are hereditary. The sovereign of Great Wa resides in Yamato, distant 12,000 li (4000 miles) from the frontier of the province of Yolang (the modern Pyong-yang in Korea). In the second year of Chung-yuan (A.D. 57), in the reign of Kwang-wu, the Ito** country sent an envoy with tribute, who styled himself Ta-fu. He came from the most western part of the Wa country. Kwang-wu presented him with a seal and ribbon." [Aston's translation.] *It is necessary to distinguish carefully between the Han dynasty of China and the term "Han" as a designation of Korea. **The ideographs composing this word were pronounced "I-to" at the time when they were written by the Hou-Han historians, but they subsequently received the sound of "Wo-nu" or "wa-do."