6 events the sources record for this year, grouped by region.
What happened
China (5)
In the fourth month of the fourth year, Abe no Omi attacks the Emishi with 180 ships; the Emishi of the Akuta and Nushiro districts, terrified, ask to surrender (Nihon Shoki (Chronicles of Japan) 日本書紀 卷第廿六 斉明紀 4年 단락33)
In the eleventh month of the fourth year, Prince Arima climbs high in Soga no Akae's house to plot rebellion, but sees an inauspicious omen and stops (Nihon Shoki (Chronicles of Japan) 日本書紀 卷第廿六 斉明紀 4年 단락48)
Prince Arima and Mori no Oishi are seized and taken under escort to the Kitō bath at Muro (Nihon Shoki (Chronicles of Japan) 日本書紀 卷第廿六 斉明紀 4年 단락49)
In 658, after Pushibi dies of illness, Yang Zhou fights Gelie Dian, routs him, captures Gelie Dian and his followers and has them all killed, and makes the land the Kucha Protectorate. (Zizhi Tongjian (Comprehensive Mirror) 권200 658년 항)
In June 658, Cheng Mingzhen, Governor of Yingzhou, and Xue Rengui, Right Yulin Gentleman, lead troops to attack and take the Goguryeo town of Chifeng, beheading more than 400 and capturing over 100. (Zizhi Tongjian (Comprehensive Mirror) 권200 658년 항)
Korean Peninsula (1)
Hasul bordered Malgal and felt insecure, so it abolished the gyeong, made it a province and established a governor. (Samguk Sagi (History of the Three Kingdoms) 卷05 武烈王 5年)