The Japan Miki Electric Assist Wheelchair (CRT-ES-4) may not be the first "integrated electric assist wheelchair" on the market, yet it stands out as the most revolutionary and user-friendly option in its category. First, this wheelchair incorporates a patented "Smart Handle Control" system developed based on the natural hand movements users make when pushing a wheelchair. This innovative design allows caregivers to operate it just like a regular wheelchair, without the need for special training. The "Smart Handle Control" system intuitively detects hand motion, direction, and force, providing assistance when going uphill and resistance when going downhill. This system thoughtfully addresses the reality of an aging society, where elderly caregivers especially benefit from technology that is not only "effective" but also "easy to use." To meet the needs of the rental and caregiving services market, CRT-ES-4 has been designed based on the demand for rental products in Japan. It specifically addresses three key needs: ease of cleaning, adaptability, and durability. The wheelchair features detachable front wheels, seat and back cushions, which can withstand high-temperature sterilization. Additionally, it offers adjustable tension back straps, armrests, and footrests, making it suitable for users of various body types. For durability, the CRT-ES-4 uses an "anodized coating" and aerospace-grade 7003 aluminum alloy, significantly enhancing scratch and wear resistance. Over 98% of electric wheelchairs on the market do not incorporate these technologies due to cost and technical constraints, making the CRT-ES-4 truly unique in its class.