This is an art-based urban development project based in the waterfront subcenter area. The aim is to connect the five areas and the vast city of over 440 hectares through art and increase its appeal. For the first project, architect Motosuke Bandai was invited to design a pavilion called ARTBAYHOUSE. The pavilion was created with the concept of "architecture that embraces the 'nature' that is unique to this place." The architecture itself is an experiential work of art, and at the same time, it is a space that serves as a base for various art and urban development projects, as it changes while being enveloped in the ever-changing nature of light, wind, rain, and plants. There is also a cafe inside, and pets are allowed inside. The space where people, plants, animals, insects, and other various "nature" can each spend their time comfortably is a place where you can experience unprecedented newness that questions the future of cities and spaces. [Social issues / Customer issues / Requests] The waterfront subcenter area has all the basic urban functions, but the scale of each building and road is large, and there was a lack of places where people could spend their time comfortably, especially outdoors. Furthermore, although there are many natural attractions not found in urban areas, such as ocean views and wide skies, these were not being fully utilized. [Solution] 1. Create a human-scale space that serves as a starting point for urban development, where people can gather and feel comfortable. 2. Create content that has the power to attract and spread information, making people want to visit. 3. Implement experimental programs that are unique to the waterfront new city center area. With these three pillars as the planning axis, we aimed to realize an art project unique to this area that would present new value while responding to the issues facing the town. <Our project members> [Sales/Project Management] Ito Etsuro, Ibe Reiko [Research/Planning] Sugimoto Taku, Yokota Tomoko, Mochizuki Mina