What did the Japanese pilots use to reconfirm their navigation?

Japanese pilots during World War II often used celestial navigation techniques as a means to reconfirm their positions. They would rely on tools such as sextants to measure the angles of celestial bodies, like the sun and stars, against the horizon. Additionally, they utilized maps and compasses to cross-verify their heading and location during flights. These methods were crucial for navigation, especially over vast oceanic distances where landmarks were not visible.