In a bamboo forest in Japan, an old man gives an impressive display of cutting with a katana. With just one, accurate hit, cleanly cuts through a bamboo trunk with a traditional Japanese sword. According to the video description, the man is a 69-year-old Japanese martial arts grandmaster from Yuzawa City in Akita Prefecture. The description also specifies that it uses a “hamaguri-ba” blade, a curved profile typical of genuine Japanese katanas, known for its strength and cutting quality.