Unable to land, the Mongol invasion force occupied the islands of Shika and Noko from which it had planned to launch raids against Hakata. Instead, the Japanese launched raids at night on board small ships. The Hachiman Gudōkun credit Kusano Jirō with boarding a Mongol ship, setting fire to it, and taking 21 heads. The next day, Kawano Michiari led a daytime raid with just two boats. His uncle Michitoki was immediately killed by an arrow, and Michiari was wounded both in the shoulder and the left arm. However, upon boarding the enemy ship, he slew a large Mongol warrior for which he was made a hero and richly rewarded. Takezaki Suenaga was also among those who raided the Yuan fleet. Takezaki also participated in driving the Mongols from Shika island, although in that instance, he was wounded and forced them to withdraw to Iki on 30 June. The Japanese defence of Hakata Bay is known as the Battle of Kōan.