学ぶハウスシステム

ハウスシステム比較

空を12ハウスに分割する方法は10種類以上あります。各システムは異なる数理と哲学に基づきます。理解のための完全ガイドを用意しました。

10

ハウスシステム

2000+

歴史年数

Placidus

最も普及

Whole Sign

最古の方式

クイック比較

システム極地対応等ハウス
#1Placidus
#2Whole Sign
#3Koch
#4Topocentric
#5Equal House
#6Regiomontanus
#7Campanus
#8Porphyry
#9Alcabitius
#10Morinus

詳細ガイド

Placidus

#1

Placidus de Titis (1603)

Divide TIME - how long each degree takes to travel from horizon to midheaven

Each house cusp is the degree that has completed 1/3, 2/3 of its semi-arc journey from rising to culminating.

長所

  • Most popular worldwide (default on astro.com, most apps)
  • Time-based - relates to the actual journey of degrees across the sky
  • Best for timing techniques (transits, progressions)

短所

  • FAILS at extreme latitudes (above ~66°)
  • House sizes can be very unequal
  • Complex iterative calculation
Modern WesternDefault for most softwareTiming astrology

Whole Sign

#2

Hellenistic astrologers (紀元前200年)

極地対応等ハウス

Each zodiac sign IS a house - the simplest possible system

The sign containing your Ascendant becomes the 1st house. The next sign is the 2nd house, and so on. No math required beyond finding the Ascendant.

長所

  • Simplest to calculate and understand
  • Works at ALL latitudes including polar regions
  • Oldest documented system (Hellenistic tradition)

短所

  • Ascendant may not be at cusp of 1st house
  • MC may not be at cusp of 10th house
  • Less precise for timing techniques
HellenisticVedic/JyotishTraditional revival

Koch

#3

Walter Koch (1962)

Divide the path the Ascendant degree has traveled since rising

Trisects the Ascendant's own journey from horizon to midheaven. The "birthplace" system.

長所

  • Popular in German-speaking countries
  • Birth-location specific (meaningful symbolism)
  • MC and ASC at natural cusps

短所

  • Fails at extreme latitudes (like Placidus)
  • Can produce extreme house size variations
  • Less theoretical justification than Placidus
GermanEbertin schoolCosmobiology

Topocentric

#4

Wendel Polich & A.P. Nelson Page (1961)

Modern refinement of Placidus accounting for exact observer position on Earth's surface

Like Placidus but adjusts for the observer being on the Earth's surface, not at its center.

長所

  • Most astronomically precise system
  • Works at higher latitudes than pure Placidus
  • Best for very precise timing

短所

  • Very similar to Placidus (minimal practical difference)
  • Still fails at extreme polar latitudes
  • Complex calculation
Modern technicalPolich-Page schoolRectification specialists

Equal House

#5

Hellenistic/Medieval astrologers (100)

極地対応等ハウス

Divide the zodiac into 12 equal 30° segments starting from the Ascendant

Start at the Ascendant degree, then each house cusp is exactly 30° further. All houses are exactly 30°.

長所

  • Simple to calculate (just add 30° each time)
  • Works at all latitudes
  • All houses equal size (30°)

短所

  • MC not aligned with 10th house cusp
  • Less traditional than Whole Sign or Placidus
  • Ignores latitude-based factors in house division
Modern simplifiedSome British astrologers

Regiomontanus

#6

Johannes Müller (Regiomontanus) (1475)

極地対応

Divide the celestial equator into 30° segments, then project via great circles

Trisects the celestial equator, then uses great circles through the north and south points to find ecliptic cusps.

長所

  • Works at all latitudes
  • Historically important (Renaissance to 18th century)
  • Good for horary astrology (William Lilly used this)

短所

  • Less intuitive than time-based systems
  • Superseded by Placidus in popularity
  • Intermediate cusps can feel arbitrary
RenaissanceHorary (traditional)European 15th-18th century

Campanus

#7

Johannes Campanus (Giovanni Campano) (1260)

極地対応

Divide the prime vertical into 30° segments, then project onto the ecliptic

Uses great circles through the north and south points of the horizon. Space-based rather than time-based.

長所

  • Works at all latitudes including poles
  • Space-based (relates to local environment)
  • Philosophically elegant (divides the "what is above" from "what is below")

短所

  • House sizes can be very unequal
  • Less intuitive than time-based systems
  • Not widely used today
MedievalMundane astrologyLocal space work

Porphyry

#8

Porphyry of Tyre (270)

極地対応

Trisect each quadrant of the chart evenly along the ecliptic

Take the four angles (ASC, IC, DSC, MC) and divide each quadrant into three equal parts. Simple trisection.

長所

  • Simpler than Placidus or Koch
  • Works at all latitudes
  • MC and IC at their natural house cusps

短所

  • Less nuanced than time-based systems
  • Can produce very unequal houses if quadrants are unequal
  • Not widely used in modern practice
Ancient GreekMedievalHistorical study

Alcabitius

#9

Al-Qabisi (Alcabitius) (960)

Trisect the semi-arcs projected onto the celestial equator

Divides the time it takes for a point to rise to culminate, projected onto the equator. Arabic tradition.

長所

  • Time-based like Placidus but simpler calculation
  • Important in medieval tradition
  • MC and ASC at natural cusps

短所

  • Fails at extreme latitudes (like Placidus)
  • Less common in modern practice
  • Requires understanding of semi-arc concept
Medieval EuropeanIslamic/ArabicTraditional

Morinus

#10

Jean-Baptiste Morin (Morinus) (1661)

極地対応

Divide the celestial equator equally, project to ecliptic without latitude adjustment

Like Regiomontanus but ignores geographic latitude entirely. Pure equator-to-ecliptic projection.

長所

  • Works at all latitudes including poles
  • Simple calculation (no iteration needed)
  • Location-independent (universal)

短所

  • Ignores geographic latitude (some see this as a flaw)
  • Ascendant may not align with 1st house cusp
  • Rarely used in modern practice
French classicalTheoreticalMorin followers

よくある質問

Which house system is correct?

None is objectively "correct" - they're all valid mathematical models. Different systems divide the sky differently, like different ways to slice a pie. The "best" one depends on your astrological tradition and what you're trying to learn about a chart.

Why does my Rising sign stay the same but planet houses change?

All systems agree on the Ascendant (Rising sign) and Midheaven - these are fixed astronomical points. What changes is where the intermediate house boundaries fall, which can shift planets between houses.

Which should I use as a beginner?

Whole Sign is the simplest to understand - each sign equals one house. Placidus is the most popular if you want to match what most apps show. Try both and see which resonates with your experience.

Why do some systems fail at polar latitudes?

Systems like Placidus divide TIME (how long each degree takes to travel across the sky). Near the poles, some degrees never rise or set, making time-based division mathematically impossible. Space-based systems like Whole Sign or Campanus don't have this problem.

Can I change my house system?

Yes! In most astrology apps, you can select your preferred house system. Your planets don't move - only the house boundaries change, which may shift which houses some planets fall in.

異なるシステムであなたのハウスを見る

あなた専用の出生図を作成し、ハウスシステムの違いで惑星配置がどう変わるかを確認しましょう。

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