Complex sentence: Kagesada may be a coward be he isn't stupid, he spent the majority of the tournament paranoid and terrified while hang around Bunshichi (who was ranked number 1 at the time).
Split into simpler sentences: Kagesada may be a coward be he isn't stupid. He spent the majority of the tournament paranoid and terrified while hang around Bunshichi (who was ranked number 1 at the time).