Teshima Atsushi's football coaching philosophy focuses on 3 key points: 1) making football fun to watch and play, 2) playing with identity and cooperation, and 3) never giving up until the end of the game. He believes sports can cultivate humanity and build a cheerful society through ability, diligence, and learning from both victory and defeat. His skills and experience include developing top players and youth programs, organizing football environments, mentoring coaches, and managing top clubs at the national level in Myanmar, Cambodia, and Japan.