あなたの知り合いを作ることを嬉しく。 (Yamato period app)

The Yamato period (大和時代 Yamato-jidai) is the period of Japanese history when the Japanese Imperial court ruled from modern-day Nara Prefecture, then known as Yamato Province.
While conventionally assigned to the period 250–710, including both the Kofun period (c. 250–538) and the Asuka period (538–710), the actual start of Yamato rule is disputed. The Yamato court's supremacy was challenged during the Kofun period by other polities centered in various parts of Japan. At least it is certain that Yamato clans had major advantages over their neighbouring clans at the 6th century.
This period is divided into the Kofun and Asuka periods, by the relocation of the capital to Asuka, in modern Nara Prefecture. However, the kofun period is an archaeological period while the Asuka period is a historical period. Therefore, many think this is an old division and this concept of period division is not popular in Japan now.
At the era of Prince Shōtoku in the early 7th century, a new constitution was prescribed for Japan based on the Chinese model. After the fall of Baekje (660 AD), the Yamato government sent envoys directly to the Chinese court, from which they obtained a great wealth of philosophical and social structure. In addition to ethics and government, they also adopted the Chinese calendar and many of its religious practices, including Confucianism and Taoism (Japanese: Onmyo).

Prince Ōsu slew his elder brother Ōsu (小碓命 Ōsu no Mikoto). His father, the emperor Keikō, feared his brutal temperament. To keep him at a distance, the father sent him to Izumo Province, today the eastern part of Shimane Prefecture, and then the land of Kumaso, today Kumamoto Prefecture. However, Ōsu succeeded in defeating his enemies, in the latter case by cross-dressing as a maid attendant at a drinking party (see image left). One of the enemies he defeated praised him and gave him the title Yamato Takeru, meaning The Brave of Yamato. But Emperor Keikō's mind was unchanged.
Keikō sent Yamato Takeru to the eastern land whose people disobeyed the imperial court. Yamato Takeru met his aunt Princess Yamato-hime, the highest priestess of Amaterasu at Ise Grand Shrine (in Ise Province) and grieved, "my father wishes I would die?" Princess Yamato-hime showed him compassion and lent him a holy sword named Ame no Murakumo no tsurugi (Kusanagi no tsurugi), which Susanoo, the brother god of Amaterasu, found in the body of the eight-headed great serpent, Yamata no Orochi. Yamato Takeru went to the eastern land. He lost his wife Oto tachibana-hime during a storm when she sacrificed herself to soothe the anger of the sea god. He defeated many enemies in the eastern land, and legend has it that he and a local old man composed the first sedōka in Kai Province with Mount Tsukuba (now in Ibaraki Prefecture) as its theme. On his return he blasphemed a local god of Mount Ibuki, which sits on the border of Ōmi Province and Mino Province. The god cursed him with disease and he fell ill.
The story above is found in the Kojiki. In the Nihonshoki version, the father and Yamato Takeru keep a good relation.
According to traditional sources, Yamato Takeru died in the 43rd year of Emperor Keiko's reign (景行天皇43年). The possessions of the dead prince were gathered together along with the sword Kusanagi; and his widow venerated his memory in a shrine at her home. Some time later, these relics and the sacred sword were moved to the current location of Atsuta Shrine.
Yamato Takeru is believed to have died somewhere in Ise Province. According to the legend, the name of Mie Prefecture was derived from his final words. After death his soul turned into a great white bird and flew away. His tomb in Ise is known as the Mausoleum of the White Plover. A statue of Yamato Takeru stands in Kenroku-en in Kanazawa, Ishikawa.