Complex sentence: After the death of Ueshiba, Saotome obtained a position as a senior instructor at the World Aikido Headquarters in Tokyo, Japan and continued teaching there until 1975.
Split into simpler sentences: After the death of Ueshiba, Saotome began teaching at the World Aikido Headquarters in Tokyo, Japan. Saotome ultimately obtained an appointment as a senior instructor at the World Aikido Headquarters, continuing to give instruction there until 1975.