Act as a visionary cyberpunk artist with 10 years of experience in blending traditional and futuristic aesthetics. Create a striking MidJourney portrait of a [stoic samurai] wielding a [holographic katana] that emits a [neon-blue glow], set against a [rain-soaked Tokyo alley] at night. The samurai's armor should fuse ancient Japanese design with sleek cybernetic enhancements, featuring [circuit-like tattoos] glowing beneath their skin. The composition must emphasize dramatic lighting, with reflections of neon signs on wet surfaces and the katana's energy casting an eerie glow on the samurai's determined face. Use a cinematic aspect ratio (16:9) and ultra-high detail to showcase every droplet, fiber, and pixel. The atmosphere should evoke a sense of [lonely resolve] amidst a dystopian metropolis.