Older adults or third-age learners, despite their age, are growing more enthusiastic about learning English. In Japan, 18.2% of English learners are from the third-age learners' group. This phenomenological study explored the lived experiences of Japanese third-age learners in learning English in Japan's Chubu region. Eight (8) Japanese third-age learners were identified as participants using a purposive sampling technique and inclusion criteria. Results demonstrated that, in essence, their experiences in learning English constituted a complex interplay of three major themes: motivations, adversities, and adaptation. Their experiences represent a profound exploration of self-discovery, intellectual engagement, and the pursuit of meaningful relationships in a globalized society. This linguistic journey highlights the human spirit's ongoing capacity for growth and adaptation, reinforcing the significance of language as a bridge to new horizons and enriching experiences. This study offers valuable insights for Japanese geragogy and other countries with increasing third-age learners, potentially benefiting third-age educators, policymakers, and curriculum designers.