a home like a ship


positioned within the forest of karuizawa, a extremely popular vacation spot with mountain resorts in japan, ‘lengthy roof home‘ designed by yuji tanabe, mimics the type of a ship. a concrete cabin emerges from the bottom, taking form as a hull, an prolonged balcony acts because the deck of the ship, and a light-weight wood mass (partially metal) on high, because the pilothouse. this manner the boundaries between the 2 volumes are clear, giving the impression that the above one is floating on the raised floor. 


the location slopes gently to the south with mountain asama within the background. this space had been broken by pyroclastic flows because of the eruption of mt. asama about 900 years in the past, and lava stones known as ‘asama stones’ seem instantly after digging the location. due to this fact, the water drainage is nice, and it’s an space with comparatively low humidity in karuizawa.all photos courtesy of yuji tanabe



approaching the ‘lengthy roof home’


the architects (see extra right here) sought to create a path for the automotive, approaching the south facet of the constructing, crossing between the bushes, and parking underneath the eaves on the bottom ground. the shed roof extends about 20m to profit from the daylight on the south facet whereas avoiding the snow to drop on the parking zone. this proportion was determined from the plan of the half the place the ceiling peak is low and the shade regulation to the adjoining land. the outer hall, which continues from the massive deck-shaped balcony, goes across the constructing whereas shifting in line with the slope of the roof above.

yuji tanabe builds ship-like dwelling among woodland area in japan
a swing with views opening to the forest



two totally different plenty coexist harmoniously 


 the bottom ground features a semi-public area with the doorway corridor, workplace, and the visitor room, whereas, on the north facet of the constructing, a stairwell leads inhabitants to the higher ground. the second stage consists of the dwelling place; kitchenette, eating desk, bed room, and bathtub. the openings are primarily positioned on the lengthy facet (east) to let in loads of pure gentle within the morning, capturing a sweeping view of the encompassing surroundings.


because the dwelling is a blended construction, it was vital to take care of a stability between the concrete and wood plenty; the ceiling with out pillars, RC (strengthened concrete) partitions and beams on the primary ground, are aware of the massive out of doors decks, pillars, and beams on the second.

long roof house 4
the flooring is clad with timber


the amenities are geared up with FF sort(pressured draught balanced flue) heating with kerosene in the principle lounge, warmth storage sort ground heating on the primary ground, and wall heating on part of the wall on the second ground. due to this fact, the plan is to make it accessible to house owners who regularly journey to and from tokyo through the yr. within the exterior plan, an out of doors area is shaped with native asama stone on the east facet whereas making use of current bushes. the continuity of the wood strategy on the primary ground, the outer hall on the second ground, and the eaves of the roof overlap in three layers. they lower out the surroundings whereas spreading within the sky, and the diagonal traces might be felt from the inside as properly. 




long roof house 5
a balcony spans on the bottom ground’s roof




the outer corridor shifts according to the slope of the roof above

the outer hall shifts in line with the slope of the roof above

semi-public space

semi-public area

night view

night time view

yuji tanabe builds ship-like dwelling among woodland area in japan


yuji tanabe builds ship-like dwelling among woodland area in japan


challenge information:


identify: lengthy roof home
designer: yuji tanabe

location: karuizawa, nagano, japan

structural engineer: low fats construction

panorama design: honda greem 

contractor: takehanagumi 

website space: 1084.30 sqm

constructed space: 116.12 sqm 

first-floor space: 104.57 sqm 

second-floor space: 89.14 sqm 

construction: strengthened concrete + wood construction 

pictures: yuji tanabe



designboom has obtained this challenge from our ‘DIY submissions‘ function, the place we welcome our readers to submit their very own work for publication. see extra challenge submissions from our readers right here.


edited by: christina petridou | designboom