I thought of writing this article because I saw that "life depends on time, and the suburbs are full of cypress trees." Perhaps in the world of ninjas, most people's endings are tragic. Their life is short, but it is long because they have experienced so much. What was green yesterday is withered today. Time has not yet made people grow old, but I have grown old first. Just growing old for whom is the most important thing in these days of nothing to look forward to.