 In the summer of 1918, Hatsu gave birth to their first son, Takemori.The young Ueshiba met Takeda Sōkaku, the founder of Daitō-ryū Aiki-jūjutsu, at the Hisada Inn in Engaru, in March 1915.Ueshiba was deeply impressed with Takeda's martial art, and despite being on an important mission for his village at the time, abandoned his journey to spend the next month studying with Takeda.