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Tsurukame Portal provides tools for learning and choosing computer parts. At its center is a learning system called SciCirc, where you learn not by having AI teach you, but by teaching AI.

Most features are free and available without registration. . Create an account later to carry over the records already on this browser.

If you came to check CPU and GPU compatibility, continue to the bottleneck calculator.

Turtle student AI asking a question

Learn by Teaching AI (SciCirc)

This is the center of the site. In a typical learning app, AI teaches you. Here the direction is reversed: you teach AI.

How the direction differs between ordinary AI and SciCirc With ordinary AI, AI explains to a person. With SciCirc, a person explains to AI. Ordinary AI AI explains You SciCirc You explains AI
Only the direction changes.

A turtle-shaped student AI solves a problem and deliberately makes a mistake. You explain which part of the answer is wrong and why. This is called a “Reverse test.”

The design is based on the protégé effect: teaching someone reveals gaps in your own understanding. You may begin writing, thinking you can explain it, and then get stuck. The place where you get stuck is the part you do not yet understand.

Because the student is AI, you do not need to feel awkward about making repeated mistakes. Read What is SciCirc? to learn why the system works this way.

Try One Session First (3 minutes)

  1. Open the learning path. Choose any subject. If you are unsure, the arithmetic drills are a light place to start.
  2. Select the circle at the top. The turtle student AI gives an answer. Check whether it is correct.
  3. If it is wrong, explain what is wrong and why. The part you cannot write is the part you do not yet understand.
Open the Learning Path

No registration or app installation is required. Create an account later to carry over the records you have already made.

Other Things You Can Do

Study-Book Roadmap

Enter your current level and target school to build a plan showing which study books to use, in what order,and for how long.

Enter your deviation score, mock-exam results, books you already own, and available weekly study time.The roadmap fits the workload into that time.

It will not simply tell you to study more.Your weekly study time is limited by daily life and does not grow just because someone says so.The available time stays fixed, and the plan reduces the workload to create a realistic order.

Study books are selected from the titles recorded on the site.AI does not invent book titles, so nonexistent books will not appear.

Build a Roadmap

There is a daily limit on roadmap creation.The result is a guide; progress differs from person to person.

How the Learning Path Works

Choose a subject to see a path of circles, then work through them one at a time from the top.

Each session takes about 3–5 minutes. You can earn up to ★★★ after completing one,and earning at least ★ unlocks the next session.

On My Page, change “Pace” to Strict, and you must average ★★ in each sectionbefore moving to the next. In return, you earn 25% more XP.You can change this later.

The format changes from session to session: multiple choice, number lines, matching lines, ordering,classification, fill-in-the-blank, written responses, sliders, and reading code.The same screen does not repeat continuously.

On a computer, a notebook appears on the right.Your notes stay with your account and can be reviewed as one notebook across subjects.

View Courses

Ask an AI Tutor (Tsurukame Duo)

Talk one-to-one with seven Kame-sensei tutors, each covering a different subject.

Kame-sensei (learning coach), Suukame (arithmetic and mathematics), Eikame (English), Rikame (science), Rekikame (social studies), Kodokame (computing and programming), and Kakokame (past exams and trends) make up the seven tutors.

Kame-sensei can see your progress on the learning path.Ask, “Check my progress,” and Kame-sensei identifies subjects where you are stuck or sessions where your stars have not increased,then suggests one thing to do today.

Choose from five answer styles.Switch between getting an answer immediately and being guided with questions.Open the gear icon to change the setting.

Talk to an AI Tutor

An account is required. Your conversation continues the next time you open it.

Explore Past-Exam Trends (Kakokame)

See how your target school structures its past exams and which topics appear often.

Answers use the recorded years, admissions categories, subjects, and question trends.Kakokame can also create practice questions aligned with those trends.

The site does not store the exam questions themselves.Entrance-exam questions are copyrighted and cannot be published without permission, even by a nonprofit service.When you need the original text, Kakokame points you to the PDF on the official website.

Ask the Past-Exam Tutor

Check a PC Build (Bottleneck Calculator)

Calculate whether the CPU or GPU limits a particular combination.

See a numerical answer to “Are this CPU and graphics card well matched?”The result changes with the use case—gaming, video editing, or everyday work—and the resolution.

View individual specification pages for 344 CPUs and 180 GPUs.You can also compare two models side by side.

Calculate a Bottleneck

How to Read Your Records

Your continued work remains visible in four forms.

XP … Earned each time you finish a session. You can set a daily goal.

Streak … The number of consecutive days studied. Missing a day resets it.

Diamonds … Earned only through learning achievements and skill-based minigames.They cannot be purchased. Use saved diamonds to draw collectible creatures.Creatures change appearance only and do not make learning easier.

Counter Jar … One counter enters the jar for every cleared session.Shake the jar or tilt it to move the counters.At 140 counters, the jar is sealed and a new one begins.Once you have 100 counters, you may seal it yourself without waiting until it is full.

Open My Page

If Something Is Not Working

Questions about accounts and passwords are covered in Frequently Asked Questions. If your question is not there, send it through Contact Us.

If your records appear to have disappeared, you may have been using the site without an account. Records made without registration are tied to the browser. Clearing cookies or using another device will not carry them over. Create an account to keep records across devices.