A popular Japanese television show, the "Ultra Quiz," is calling for new participants. Applicants must display a certain level of mental strength, general knowledge, and perseverance, as the show notoriously puts the competitors through rigorous mental challenges. The percentage of successful participants each year is relatively small, which continues to make the Ultra Quiz a much-anticipated event across Japan.

Japanese people care about the Ultra Quiz because the show not only entertains but also glorifies intelligence and resilience. It reflects social values of perseverance, education, and respect for knowledge. Legally, there are no specific issues involved as the show is closely monitored and regulated to prevent any harm to participants.

It's quite similar to other grueling quiz-based reality shows worldwide, such as the American show, 'Jeopardy,' where participants also require a wide range of knowledge and quick thinking to succeed. It is not just about winning the game but also about the honor and prestige that come along with the victory.