Design a 4K anime-style digital illustration featuring Sakura Blade, a Japan-themed superheroine. She is depicted as a female samurai enforcer, with long, jet-black hair styled in a sleek ponytail and sharp, intense dark brown eyes. She wears advanced, futuristic samurai armor adorned with intricate cherry blossom motifs. In her hand, she wields a glowing, energy-infused katana, its radiant blade casting a soft light across her armor. Her skin appears smooth and radiant, with a calm yet determined expression, conveying both strength and serenity. Sakura stands in a dynamic sword-drawing pose, full-body, atop a futuristic Tokyo skyline illuminated by neon lights and holographic billboards. The background is a mix of towering skyscrapers and glowing urban sprawl. The image should capture perfect anatomy, with finely detailed skin textures and lifelike proportions. Use a shallow depth of field to focus on the character, and enhance the image with HDR effects to highlight the reflective surfaces of her armor and the glow of her katana. Render in full HD, 4K resolution to bring out the finest details and achieve a cinematic quality.