Vintage Air Mail envelope sent from martial arts grandmaster Yumio Nawa to his Robert C. Gruzanski. The front side features a 110-Yen Japanese postal meter stamp from the Asagaya Station post office (Asagayaekimae) dated March 30, 2004 (Heisei 16). The reverse side features Nawa’s hand-drawn calligraphy signature seal (Fūji) utilizing the character “豊” (Yumi).