Ono no Imoko is dispatched as envoy to the Sui court in China

On 01/08/607 CE, the Japanese court under Empress Suiko and her regent, Prince Shōtoku, dispatched a diplomatic mission to the Sui Dynasty in China, led by the envoy Ono no Imoko. This mission, recorded in the Nihon Shoki, represents one of the earliest formal efforts by Japan to establish direct diplomatic relations with a major East Asian power. The envoy carried official correspondence from the Japanese court to Emperor Yang of Sui. The message is known for its distinctive phrasing, addressing the Chinese ruler as an equal by referring to both sovereigns with the title “Son of Heaven.” This wording departed from the traditional hierarchical framework of regional diplomacy, in which neighboring states were expected to acknowledge Chinese supremacy. Beyond diplomacy, the mission aimed to facilitate cultural and institutional exchange. Contact with the Sui Dynasty provided access to administrative systems, writing practices, and religious influences, including Buddhism. These exchanges contributed to reforms within the Japanese court during the Asuka period, shaping governance and cultural development. The 607 mission marked the beginning of a series of official embassies sent from Japan to China, reflecting an ongoing effort to engage with continental systems while developing a distinct political identity.