To minimize waste, he also used sections with wrinkles and scratches. Each part was meticulously fine-tuned by hand through repeated adjustments, taking over half a year to complete. Because the work prioritized artistry over practical weight and durability, the finished backpack weighs about 2.1 kilograms, compared with the average 1.3 kg. "We recommend it for display purposes," he said with a laugh. Each armor-style backpack sells for 500,000 yen (roughly $3,170) and is made to order. More than 10 inquiries have come in, mostly from overseas. Okada is currently producing two for customers.