動詞ば形 / 形容詞ければ / 名詞・な形であれば + こそOnly because
Emphasizes that a specific reason is the sole or primary cause for a result. It is often used to clarify that a seemingly negative action (like strictness) stems from a positive intention.
Common mistakes
- Confusing it with 'kara koso', which is less formal and literary
- Using it for negative results (it usually implies a necessary or positive justification)
- Misconjugating the 'ba' form for nouns (must use 'de areba')