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Junior-High Exam Research DeskChuju Heigan

Quantitative analysis · Application portfolio

Built on probability, not gut feeling.Your junior-high exam application portfolio.

Using 16 years of Tokyo-area hensachi (deviation score) data and 10,000 simulation runs, we rank 3–5 application portfolios tailored to your child by expected admissions, risk, cost, and schedule. Quantitative decision support, independent of cram-school interests.

Try the optimal portfolioSee school data

Subscription ¥2,200/year for unlimited runs · free during beta

— 02 · Data Asset

Built entirely from public sources, independent of cram schools, with no conflicts of interest

  • 01 · years of hensachi history

    17

    日能研 R4, 2010–2026

  • 02 · junior-high schools tracked

    293

    273 in Tokyo area + 20 elsewhere

  • 03 · outcome hensachi records

    35,748

    combined across 4 sources (ONETES / 日能研 / 四谷 / SAPIX)

  • 04 · hensachi scales unified

    4 sources

    首都圏模試 / SAPIX / 日能研 / 四谷大塚

— 03 · How It Works

Three steps to an application portfolio built on data, not gut feeling

  1. Step 01

    Enter your child's hensachi and constraints

    Takes about 3 minutes: current hensachi (SAPIX / 日能研 / 四谷大塚 / 首都圏模試), gender, commuting range, and target portfolio size.

  2. Step 02

    Optimized across 10,000 simulation runs

    We estimate admission probabilities from 16 years of hensachi-to-outcome data. A dedicated optimization engine resolves schedule overlaps to find the best combination, including afternoon exams and multi-round attempts.

  3. Step 03

    Compare 3–5 ranked application portfolios

    Compare 5 patterns by expected admissions, shut-out probability, total exam fees, and schedule. Pick the one that fits your child's strategy.

— 04 · Sample application portfolio

Preview: hensachi 64, boy (hypothetical)

The output below is a sample for a hypothetical child. Your actual results will include 5 patterns based on your own child's hensachi and constraints.

FIG. 02
#1Recommended
Overall score 3.27

Expected admissions

3.35

At least one admission

99.2%

Shut-out probability

0.8%

Exam schedule

  1. 2/1

    AM

    開成中学校Choice #1

    第1回 · 32%

    PM

    早稲田中学校

    第1回 · 58%

  2. 2/2

    AM

    城北中学校

    第2回 · 71%

    PM

    桜丘中学校

    適性検査 · 83%

    ✓ Admission secured

  3. 2/3

    —

  4. 2/4

    AM

    関東学院六浦中学校

    第C日程 · 91%

  5. 2/5

    —

  6. 2/6

    —

By school

  • 開成中学校02-01·AMStretch32%
  • 早稲田中学校02-01·PMOn target58%
  • 城北中学校02-02·AMOn target71%
  • 桜丘中学校02-02·PMSafety83%
  • 関東学院六浦中学校02-04·AMSafety91%

AM = morning · PM = afternoon

— 05 · Approach

Simulation-driven decisions, independent of cram schools

Junior-high hensachi (deviation scores) are published on different scales by each cram school. This service is built entirely from public data: we unify four hensachi scales, then run many scenarios simulating your child's performance on exam day. We quantify expected admissions, shut-out risk, and exam-fee cost to produce an application portfolio grounded in data rather than intuition.

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