buildings that have been squeezed into left-over urban spaces. The name "Pet architecture" refers to houses which have pet-like characteristics, such as being small, humorous, charming, rebellious, unexpected and adapt themselves to their environments. As pet architecture does not use the forefront technology and does not make the appearance its first consideration, it is a great tool for users to customise their building on a low budget. Since it is defined by using curious shapes and inventive solutions for drainage, windows and air conditioning, they highlight their unique location, produce a relaxed atmosphere and therefore help to relieve the occupant. Hanamidori The Hanamidori Cultural Center is a multipurpose building built at Showa Memorial Park at Tachikawa, Tokyo in 2005 just 10 minutes of walking distance from the Tachikawa rail station. It occupies a total floor area of 6,031.64 m2 with the design developed by principal architects Masakazu Suzuki and Momoyo Kaijima in cooperation with Atelier Bow-wow and centralises the experience of the Green Culture Zone and the functions for exchanging and providing information. "The basic concept was for a “growing architecture”, in response to the developing activities of green culture, and for 'parkitecture' - architecture integrating with landscape, in which interior and exterior are connected. Our intention was for a space as comfortable as in the shade of a tree that would provide support for park activities. " The building includes exhibition space, workshops, cafe and library all built within the 15 cylinders that supporting an undulating roof covered by green. The spaces between the cylinders are arranged with furniture that can change depending on function and form with a glazed external skin allowing for a visual connection with the exterior. The facade can be opened up in good weather providing an unhindered access to the exterior. House Tower Located in Shinagawa-ku district of Tokyo, the House Tower, setting back from the street and rising over 11 metres in height, occupies only an 18.5m2 building area of its constrained 42m2 site. With its unique ‘tallness’ and seemingly irrational openings, this re-enforced concrete building somehow resembles a ‘one-eyed monster’, hiding awkwardly in the neighbourhood, sneaking around behind obviously ‘shorter’ counterparts, as if trying to find a chance to escape. Due to the site constraints, the house breaks from the conventional architecture planning, and is articulated as a single volume. The different space of a common house is not defined by walls