Complex sentence: Ibaraki harassed people who tried to pass through to Rashomon Gate until a heroic samurai named Watanabe no Tsuna, a loyal retainer of Minamoto no Raiko, went to subdue the cruel Ibaraki.
Split into simpler sentences: Ibaraki harassed people who tried to pass through to Rashomon Gate. Finally, a heroic samurai named honor Watanabe no Tsuna, a loyal retainer of Minamoto no Raiko, went to the Rashomon Gate to subdue the cruel Ibaraki.