さえ～ば

The pattern さえ～ば expresses the idea that one single condition is sufficient for a desired outcome. It translates to "if only," "as long as," or "provided that," and emphasizes that nothing else is needed – just this one thing.

The core idea: the particle さえ ("even") highlights the minimum requirement, and the ば conditional states what follows if that requirement is met.

With nouns

The most common pattern is Noun + さえ + Verb[ば-form], often with ある → あれば.

With verbs

When expressing "if only someone does X," attach さえ to the verb stem and add すれば:

Verb[ます-stem] + さえ + すれば

You can also use the て-form + さえ + いれば to mean "if only one keeps doing X":

With い-adjectives

Remove い and add くさえあれば:

With な-adjectives and nouns

Use Noun／な-adjective + でさえあれば:

Nuance

This pattern often carries a slightly wishful or emphatic tone – the speaker feels that this one condition is the key to everything. It can also imply that other conditions are unimportant or already satisfied.