On the Gokai Galleon, the crew review their twenty-eight powers they obtained and the five that Basco has taken. When they realize one of the Great Powers is missing, Gai reveals that the only one yet to be found is that of the Ninja Sentai Kakuranger team. With it being his last fortune, Navi's only clue is saying "a ninja is playing hide and seek", which makes no sense to the Gokaigers. When Ahim mentions praying at a shrine to better their chances, the crew remembers their meeting with Domon and the mission he gave them to save the Negakure Shrine, which they realize has the same characters as "kakure".
Streaming Kaizoku Sentai Gokaiger Episode 45