This is a 4-day, 3-night event held in Yatsugatake (Yamanashi and Nagano Prefectures) for 8th-grade students during Study Week in September. Through activities in the great outdoors, students cultivate leadership, solidarity, perseverance, and problem-setting and problem-solving abilities. Furthermore, a strong relationship of trust is forged among students through these activities. It also nurtures a spirit of challenge, judgement, and decisiveness.

1. To approach activities within a natural environment different from daily life with a spirit of challenge, taking a step forward of one's own volition, and discovering new facets of oneself and one's peers.
2. To experience overcoming matters through cooperation with peers that could not be accomplished alone, thereby learning the importance of collaboration and relationships of trust.
3. To appreciate the sense of accomplishment and deep emotion gained by dedicating oneself wholeheartedly to a task—regardless of success or failure—thereby realizing the true meaning of living as a human being.