EJU Cheat Sheet 2026

The 30 highest-yield EJU facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Japan's demographic challenge of population aging is most directly driven by: → A total fertility rate that has remained far below the replacement level of about 2.1
2. In Japanese, the grammar pattern 〜なければならない is used to express which meaning? → Obligation or necessity
3. Which of the following statements is true about the relationship between the graph of a function y = f(x) and its inverse function y = f⁻¹(x)? → They are reflections of each other across the line y = x.
4. During Japan's summer monsoon season, weather across most of the country is characterized by: → Warm, moist air arriving from the Pacific Ocean and Southeast Asia
5. Japan's population distribution is best described as: → Heavily concentrated in coastal lowlands, plains, and river valleys
6. In the EJU Japanese listening test, which skill is most directly assessed? → Understanding spoken Japanese in lecture and conversation settings
7. What is electric power (P) in terms of voltage (V) and current (I)? → P = VI
8. A single fair die is rolled. What is the probability that the number rolled is a prime number, given that the number is odd? → 2/3
9. Ohm's Law states that the current through a conductor is: → Directly proportional to the voltage and inversely proportional to the resistance
10. Two vectors are given: a⃗ = (3, 4) and b⃗ = (1, -2). What is the dot product a⃗ · b⃗? → -5
11. 現在の日本の衆議院議員選挙で採用されている選挙制度の名称として、最も適切なものはどれか。 → 小選挙区比例代表並立制
12. When writing an EJU essay arguing for a position, what technique strengthens the argument? → Providing specific examples and reasons to support the main claim
13. If v =〈a,b〉, then a is the ___________ component of v. → Horizontal
14. Which of the following is an example of a compound sentence connector used in formal Japanese essays to add information? → さらに
15. 第二次世界大戦後に制定された日本国憲法（いわゆる「平和憲法」）の基本原則に関する記述として、最も適切なものはどれか。 → 国の主権的権利としての戦争を放棄し、戦力の不保持を定めている。
16. The line through points (1, 2) and (4, 8) has slope m. What is m? → 2
17. Which of the following correctly describes the Doppler effect? → The observed frequency of a wave changes when the source or observer is moving
18. Which of the following correctly lists Japan's four main islands? → Honshu, Hokkaido, Kyushu, and Shikoku
19. Find the missing number in the sequence: 3, 6, 9, __, 15. → 12
20. The Tokyo Metropolitan Area (Greater Tokyo) is notable globally for being: → The world's most populous metropolitan area with over 37 million people
21. Japan's policy of protecting 'satochi satoyama' (里地里山) landscapes refers to preserving: → Traditional rural mosaics of rice paddies, grasslands, and secondary forests
22. 2015年に国連サミットで採択された「持続可能な開発目標（SDGs）」に関する記述として、最も適切なものはどれか。 → 「誰一人取り残さない」という理念に基づき、経済・社会・環境の三側面を統合的に扱う普遍的な目標である。
23. 日本国憲法における天皇の地位に関する記述として、最も適切なものはどれか。 → 国民統合の象徴であり、国事行為のみを行う。
24. In the EJU physics context, what phenomenon occurs when two waves overlap and their displacements add together? → Superposition
25. Find the magnitude of the vector . → √13
26. What is the relationship between wave frequency (f), wavelength (λ), and wave speed (v)? → v = fλ
27. Approximately what percentage of Japan's total land area is used for agriculture? → About 12%
28. 同位体である ³⁵Cl と ³⁷Cl の関係について、正しい記述はどれか。 → 陽子の数は同じだが、中性子の数が異なる。
29. Two resistors of 4Ω and 6Ω are connected in series. What is the total resistance? → 10Ω
30. In a DC circuit, what happens to the total current when an additional resistor is added in parallel? → Total current increases because the equivalent resistance decreases