Official exam-administration information establishes the Japanese second-class architect examination as a two-stage credential: an academic written exam and a design drafting exam. The design drafting exam cannot be taken unless the academic exam has been passed. The academic schedule combines papers I (architectural planning) and II (building regulations) in a three-hour block, and papers III (building structures) and IV (building construction) in a second three-hour block; design drafting is a five-hour paper. The pages do not provide topic-level official syllabi, question counts, weightings, pass marks, fees, or a current drafting brief. The four domains in this package are a study alignment, not an official syllabus. This is a preview and subject review: verify application details, applicable-law date, current rules, and drafting instructions with the official authority. The MCQ sample checks supporting knowledge only and is not a simulation of either examination. Use the official two-stage structure to organise study: pass the academic papers first, then train design drafting separately. Focus on adjacency, service math, structural equilibrium, construction logic, and drawing coordination. Verify all current rules and instructions with the official authority.
What the credential actually requires
This credential has an academic written stage and a later design drafting stage. The official exam information does not give topic weights, pass marks, or question counts, so treat those as unverified until you check current official guidance. This knowledge preview is not a simulation.
You should plan around two examinations: the academic written exam and the design drafting exam. Design drafting cannot be taken until you have passed the academic exam. The academic schedule is organised into two three-hour blocks: papers I and II together, then papers III and IV together; the design drafting paper is five hours. These are structural facts from the official exam information, not a complete syllabus.
The four study domains are useful for organising your preparation, but do not mistake them for official weightings. The official exam information does not list topic-by-topic marks, pass thresholds, fees, or question counts, and it does not define a current drafting brief. A sound study plan therefore treats this guide as subject review and uses current official papers and current-year instructions for final scope and format.
Priority map: study where errors compound
Prioritise fundamentals that feed later decisions: adjacency, service quantities, structural equilibrium, construction logic, and drawing consistency.
Begin with planning and environment because room relationships, orientation, and moisture logic affect almost every later drawing decision. Then secure services and regulations through simple quantitative checks: coverage and floor-area arithmetic, ventilation and drainage principles, and escape-route continuity. Structures and construction come next because they constrain the plan grid, section depth, and foundation choices.
Do not study the four domains as isolated subjects. A plan move changes the structural grid; a service core changes room adjacency; a site constraint changes the section and elevation. Use short mixed sets that combine calculation, diagram interpretation, and written justification. Keep an error log by cause—misread condition, unit slip, missed load path, unclear drawing convention—rather than by topic name alone.
Planning and environment: adjacency before aesthetics
Start with a bubble diagram and test it against daylight, ventilation, privacy, and wet-room grouping before drawing walls.
Take a 10 m by 20 m site with a road to the south. A two-storey proposal has an 8 m by 12 m footprint: site area is 200 m², footprint is 96 m², so coverage is 96/200 = 48%. If both floors are 96 m², total floor area is 192 m² and the floor-area ratio is 192/200 = 96%. These are arithmetic checks on a study scheme, not statements of legal limits.
Place the main living/dining space toward the south, with shading for summer afternoon gain. Put the kitchen near the wet core and the bath/laundry together to shorten plumbing runs. If the site is 10 m wide, a south-facing living room can receive useful winter light, but an unshaded west window may create overheating. Cross-ventilation needs an inlet and an outlet with an open internal path; a single window gives limited single-sided ventilation.
For moisture, avoid trapping vapour between low-permeability layers. In a winter-heated room, an interior vapour retarder combined with a low-permeability exterior sheathing can trap moisture at a cold layer. The design response is not a universal recipe: verify the wall assembly, climate, and detailing. The planning lesson is to treat environment, wet services, and enclosure as one system.
Services and regulations: quantify, then verify
Use simple ratios and flow-path diagrams, then check the current code and official instructions rather than memorising unsupported thresholds.
A study site of 500 m² has a footprint of 175 m² and total floor area of 425 m². Coverage is 175/500 = 35%; floor-area ratio is 425/500 = 85%. If a hypothetical study brief sets a 120% floor-area limit, the maximum total floor is 500 × 1.20 = 600 m², leaving 175 m² of headroom above the current scheme. The brief supplies the limit; the arithmetic alone does not establish a legal rule.
For drainage, a vent equalises pressure and helps protect the trap seal. Without it, siphonage or back-pressure can pull the seal and allow sewer gas into the room. For hot water, a long pipe run increases heat loss and waiting time, so grouping wet rooms near the heater is usually preferable; recirculation can reduce waiting but must be considered as part of the energy strategy.
Escape planning is about continuity. From a room door to the final exit, the route should remain usable and unobstructed, with protection where required. A cupboard in a corridor or a locked final exit is not cured by a sign. Fire compartmentation and evacuation planning are code- and building-specific; use the current Building Standards Act material and official guidance for compliance, not general heuristics.
Structures and construction: free-body logic and simple checks
Draw the free body, find reactions and maximum moment, then trace a continuous lateral and vertical load path to the ground.
For a simply supported beam spanning 4 m under a uniform load of 5 kN/m, total load is 5 × 4 = 20 kN. Each vertical reaction is 20/2 = 10 kN. The maximum bending moment for a uniform load is wL^2/8 = 5 × 16/8 = 10 kN·m. If the section modulus is 0.002 m³, bending stress is M/S = 10/0.002 = 5,000 kN/m², or 5 MPa. The check is conceptual: confirm units, support conditions, and whether the section is adequate.
Lateral resistance needs a complete path. Bracing or structural sheathing must connect roof or floor diaphragm action through walls and connections to the foundation. A single brace that stops mid-height, or heavy roofing without wall bracing, does not create a reliable path. For construction, distinguish material behaviour: timber connections and moisture exposure, steel buckling and connection detail, and reinforced concrete cover and curing all affect performance.
Foundations follow the ground. If soft clay overlies competent dense sand at depth, a shallow spread footing may be plausible only after a settlement check; heavier loads or thick compressible clay make piles or ground improvement candidates. Do not choose a foundation by habit. The exam-style reasoning is: loads, bearing stratum, settlement, groundwater, and construction practicality.
Drafting and integrated judgment: make the drawing argue clearly
Use a consistent scale, line-weight hierarchy, and cross-check between plan, section, elevation, structure, and services.
At 1:100, a 2.4 m corridor is 2,400 mm / 100 = 24 mm on paper. At 1:50 it is 48 mm. Check scale before judging whether a corridor, stair, or door swing fits. For line hierarchy, cut walls should be heaviest, visible elements medium, and grids, dimensions, and notes light. Symbols must mean the same thing on every sheet.
Use site analysis to generate design moves, not decoration. On a 15 m by 24 m site with a road to the west, a two-storey 10 m by 16 m building has a 160 m² footprint on a 360 m² site, so coverage is 160/360 = 44.4%. Two equal floors give 320 m² total floor and a floor-area ratio of 320/360 = 88.9%. If the prevailing summer wind is from the south and a tall neighbour is north, place entry and service buffer toward the west road, main living/reading space toward the south with shading, and use high north openings for daylight while managing privacy.
Integrated judgment means checking one decision against three systems. A two-storey scheme with a 5 m by 4 m structural grid cannot simply grow a 7.2 m cantilevered corner without a load path, deflection check, and service route. Either add a column, redesign the grid, or develop a credible cantilever and then coordinate drainage, ducts, and ceiling depth. Cross-check plan, section, and structure before adding detail.
Common errors and self-correction
Most avoidable errors come from skipping the condition, mixing units, or drawing before resolving the system.
In planning answers, do not substitute taste for adjacency analysis. State the user flow, the service grouping, and the environmental consequence. In services and regulations, keep coverage and floor-area ratio separate and label the numerator and denominator. Do not invent a legal threshold when the question supplies only a study brief.
In structures, check support conditions before using a formula. A cantilever does not have the same moment diagram as a simply supported beam. Keep kilonewtons, metres, millimetres, and megapascals consistent. In construction, avoid naming a foundation or connection without referring to load, soil, moisture, and buildability.
In drafting, the most common visual error is flat line weight: everything looks equally important. The second is inconsistency between plan and section. Before adding furniture or notes, reconcile grid lines, wall thicknesses, levels, stairs, and service shafts. A clean drawing is not necessarily coordinated; coordination is the test.
Integrated practice task and self-check rubric
Use one open-task cycle to connect brief, bubble diagram, plan, section, and a written justification; the MCQ set is supporting knowledge only, not an exam simulation.
Practice task: on an 18 m by 30 m site with a road to the south, sketch a two-storey small community learning centre of about 300 m² total floor area. Include entry, reception, two rooms that can be combined, a wet core, a staff room, and a vertical circulation core. First draw a bubble diagram with public, quiet, and service zones. Then draw a 1:100 plan, one 1:50 section through the stair and a wet area, and a simple site diagram showing sun, prevailing summer wind, access, and neighbour privacy. Write 250 words explaining three trade-offs.
For an academic-paper task, answer a mixed set under timed conditions with no notes, then mark the cause of each error. For a drafting task, use a checklist rather than a stopwatch alone: brief compliance, adjacency logic, environmental response, structural grid continuity, service grouping, escape-route continuity, scale accuracy, line hierarchy, and drawing coordination.
Self-check rubric, 0–2 each: (1) brief and site constraints are visibly addressed; (2) public/quiet/service zoning is coherent; (3) daylight and ventilation moves are explained; (4) structural grid and section agree; (5) wet core and service routes are grouped; (6) escape routes are continuous; (7) scale and line weights are consistent; (8) written justification names trade-offs. A score of 12–16 means the scheme is reviewable; below 12, revise the concept before detailing. This is an open-task exercise, not a prediction of official scoring.
Practical study sequence
Run a six-week cycle from fundamentals to integrated timed work, then repeat with error-focused review.
Weeks 1–2: rebuild fundamentals. Study planning adjacency and environmental principles, basic services, coverage/floor-area arithmetic, and simple structural equilibrium. Draw one bubble diagram and one beam free-body diagram daily. Weeks 3–4: add construction and regulations. For each topic, write a one-page mechanism sheet: condition, principle, worked example, common error, and what must be verified in the current code or official instructions.
Weeks 5–6: integrate. Complete two 90-minute mixed academic sets and two 90-minute drafting exercises. After each, mark errors by cause and redo only the failed mechanism. Keep a one-page “drawing reconciliation” checklist beside the board: grid, levels, stairs, wall thickness, service shafts, door swings, and line weights. End each week by explaining one design decision aloud in 60 seconds. This sequence is a study structure, not a claim about official exam difficulty or outcomes.
References and further reading
Use these references to explore the concepts and check the latest information from the relevant organizations.