Transform the vintage Japanese apartment living room into a bold modern maximalist space. Replace the neutral tones and simple furnishings with rich, saturated colors and striking patterns. Introduce teal walls, a magenta velvet sofa with patterned throw pillows, and vibrant floral curtains. Swap the plain rug for a colorful, intricate one, and add statement lighting like a crystal chandelier. Retain the large window and plants, but enhance them with layered textures, gold accents, and eclectic decor that celebrates maximalist design energy and personality.