Introduction
The phrase "Being invincible under the sun" attributed to Musashi Miyamoto who lived in 1584 Japan, serves as a metaphor reflecting his relentless pursuit of physical strength, rooted in a tumultuous childhood marked by war and an abusive father. Driven by a deep-seated fear of isolation, Musashi dedicates his life on making a name for himself as the strongest samurai and thus becoming “Invincible under the sun”.