〜てくる: Onset of Sensations & Change

Alongside the long-range "change over time" 〜てくる, there is a tighter, more immediate use of the same auxiliary: it marks the onset of something — a bodily sensation, a perception, a spontaneous shift — as it comes on and reaches you. At the first drops you say 雨が降ってきた; as hunger sets in, お腹が空いてきた; as something swims into view, 見えてきた. The English that fits is "has begun to / is starting to." This てくる is one of the most native-sounding patterns you can learn, and English speakers routinely miss it because their instinct is to report the finished event instead.

Inception: the change "comes on"

The core meaning is emergence reaching the experiencer. くる is still "come" — but what comes is the change itself, arriving at you. A state that wasn't there a moment ago begins, and its arrival is what the sentence foregrounds.

Weather and spontaneous onsets

Weather changes are the textbook home of this pattern. At the moment the rain, wind, or cold begins, native speech reaches for 〜てきた rather than the plain past, because the point is the onset, not a completed fact.

Sensory emergence: 見える, 聞こえる, する

A whole class of perception verbs pairs beautifully with てくる to mean "comes into perception." Crucially, these are the spontaneous perception verbs — 見える "be visible," 聞こえる "be audible," 匂いがする "there's a smell" — not the volitional 見る "look at" or 聞く "listen." You aren't actively perceiving; the sight or sound arrives at your senses.

Why not just the plain past?

This is the heart of it. The plain past (降った, 空いた, 出た) reports a completed event as a finished fact. The てくる version foregrounds the arrival of the change — the very onset, unfolding toward you. At the first raindrops, 降った ("it rained") sounds like a weather report after the fact; 降ってきた ("it's started coming down") captures the live moment a native speaker actually narrates.

Because it tracks a sensation reaching the experiencer, this てくる is the natural, near-automatic choice for bodily states (空く, 眠い, 疲れる, 痛い) and weather onsets — which is exactly why fluent speech says 降ってきた at the first drops rather than 降った.

How this differs from English

English marks inception with a phrasal verb or a helper: "it's starting to rain," "I'm getting hungry," "the lights came into view." Japanese folds all of that into one auxiliary whose literal sense is "come." There's no separate word for "start"; the directionality of くる — the change moving toward you — does the work. English speakers, whose native reflex is a plain past ("it rained," "I got hungry"), tend to reach for 降った／空いた and lose the "coming-on" nuance entirely. Retraining that reflex — noticing the live onset and marking it with てくる — is one of the fastest ways to sound less like a textbook and more like a person.

Common mistakes

Reporting an onset with the plain past. At the first sign of a change, the finished-fact past misses the "starting to" nuance.

Using 見る instead of 見える for "come into view." Only the spontaneous 見える works with this "emerging into perception" てくる.

Using ていく for emergence toward you. A perception arriving comes toward the experiencer, so it's てくる, not ていく.

Marking a spontaneous sensation with を. Sensations like hunger take an intransitive verb with が, not を — there's no object.

Dropping てくる for a state that is gradually coming on. Plain 眠くなった states a result; 眠くなってきた captures it setting in.

Key takeaways

• This 〜てくる marks the onset of a sensation, perception, or spontaneous change as it comes on and reaches you: "starting to / beginning to."
• It's the natural choice for bodily states (空く, 眠い, 疲れる, 痛い) and weather onsets (降る, 冷える) — 降ってきた, not 降った, at the first drops.
• With spontaneous perception verbs (見える, 聞こえる, 匂いがする) it means "comes into view / earshot"; the opposite, fading away, uses ていく.
• Don't default to the plain past — it reports a finished fact and loses the live "coming-on" feel a native speaker foregrounds.