Wasuregusaniyosu is the debut poetry collection by Michizou Tachihara, a prominent figure in early 20th-century Japanese literary modernism. The collection consists of ten sonnets, a form known for its strict structure and often used to explore themes of love, loss, and mortality. Tachihara's sonnets are imbued with a deeply melancholic tone, reflecting on the fleeting nature of beauty and the passage of time. Through evocative imagery and subtle symbolism, he explores the complexities of human emotions and the relationship between memory and experience. The collection offers a glimpse into Tachihara's early poetic voice and its preoccupation with themes that would continue to define his later work.