The founder of Bugaku and Samurai martial arts instructor Koshiro Minamoto greets his students as he concludes an online class for Samurai experience in Tokyo, Japan, April 1, 2021. Minamoto, who has studied martial arts for 35 years, is known for his invention of Bugaku, or "warrior dance", a unique type of performance art that combines the styles of samurai sword play with the song and dance of classical Japanese drama. EUTERS/Kim Kyung-Hoon

The founder of Bugaku and Samurai martial arts instructor Koshiro Minamoto demonstrates martial arts during an online class for Samurai experience in Tokyo, Japan, April 1, 2021. Minamoto had hoped his business would thrive during the Tokyo Olympics. He spent around $45,000 (5 million yen) on equipment and renovations of his school in 2019, preparing for the flood of foreigners. REUTERS/Kim Kyung-Hoon

The founder of Bugaku and Samurai martial arts instructor Koshiro Minamoto gives explanations about Samurai armors to his students during an online class for Samurai experience in Tokyo, Japan, April 1, 2021. REUTERS/Kim Kyung-Hoon

The founder of Bugaku and Samurai martial arts instructor Koshiro Minamoto holds a tablet as he shows his students a Samurai armor during an online class for Samurai experience in Tokyo, Japan, April 1, 2021. REUTERS/Kim Kyung-Hoon

The founder of Bugaku and Samurai martial arts instructor Koshiro Minamoto applauds to his students who practice Samurai martial arts during an online class for Samurai experience in Tokyo, Japan, April 1, 2021. REUTERS/Kim Kyung-Hoon