An earthquake struck Hedong; Jinzhou was hit especially hard, and more than 5,000 people were crushed to death. (Old Book of Tang (Jiu Tangshu), Annals 舊唐書 卷4 貞觀23年 8月)
Emperor Taizong died in the Hanfeng Hall at the age of 53; two days later, escorting the imperial mother, he returned to Chang'an. (New Book of Tang (Xin Tangshu), Annals 新唐書 卷002 太宗 貞觀23年5月)
In the third month of the fifth year, Soga no Himuka slanders Minister Kurayamada, claiming he plans to harm the crown prince (Nihon Shoki (Chronicles of Japan) 日本書紀 卷第廿五 孝徳紀 5年 단락89)
On the day jiaxu of June 649, the first day of the month, Emperor Gaozong ascends the throne and grants a general amnesty throughout the realm. (Zizhi Tongjian (Comprehensive Mirror) 권199 649년 항)
Japan (1)
Minister Kurayamada kills himself at Yamada-dera; the army surrounds the temple, and his retainers take their own lives (Nihon Shoki (Chronicles of Japan) 日本書紀 卷第廿五 孝徳紀 5年 단락95)