Tea Ceremony House at Tokyo National Museum Garden - Five historic teahouses are the highlight of the garden - and are available for tea ceremony and other events by booking in advance. Traditional Japanese architecture is designed around specific purposes. The chashitsu literally tea room is one special type of architecture, usually very small and made of natural materials: wood, plaster, reed tatami floors, and shoji paper windows. The special architectural style that developed for chashitsu is called sukiya style or specifically sukiya zukuri. It has come to indicate a style of designing public facilities and private homes based on tea house aesthetics. Features of chashitsu typically include a tokonoma alcove; subdued colors, and the size is ideally 4.5 tatami mats.