Answer
Takeda Sōkaku, a renowned martial artist from the Daitō-ryū lineage, holds significance in the life of Morihei Ueshiba. Their fated encounter in Hokkaidō, a northern island of Japan, proved pivotal in Ueshiba's martial arts journey. Sōkaku, a master of Daitō-ryū aikijujutsu, imparted his extensive knowledge and techniques to Ueshiba, profoundly influencing the development of Aikido, the martial art Ueshiba later founded.