N2 — outside your level filter

一方いっぽうだ

いっぽうだippou daN2neutral

rise + only keeps happening — a one-way trend with no sign of stopping

agaru ippou da

only keeps happening — a one-way trend with no sign of stopping

meaning: keep on rising

Same meaningRelated

上あがる
〜一方いっぽうだ
上あがる一方いっぽうだ

最近さいきん、体重たいじゅうが上あがる一方いっぽうだ。

saikin, taijuu ga agaru ippou da.

Lately, my weight keeps on rising. neutral

給料きゅうりょうが上あがらなくて、生活費せいかつひは上あがる一方いっぽうだよ。

kyuuryou ga agaranakute, seikatsuhi wa agaru ippou da yo.

With my pay flat, my living costs keep on rising. casual

Same meaning3

keeps getting; goes on happening

ていくchange onward from now; do and goattaches at
てくるhas been getting; starts happening; go do and come backattaches at
続つづけるkeep doing; continue to doattaches at

All examples3

only keeps happening — going one way, never turning back

最近さいきん、体重たいじゅうが増ふえる一方いっぽうだ。
saikin, taijuu ga fueru ippou da.
Lately, my weight keeps on increasing. neutral
給料きゅうりょうが上あがらなくて、生活費せいかつひは上あがる一方いっぽうだよ。
kyuuryou ga agaranakute, seikatsuhi wa agaru ippou da yo.
With my pay flat, my living costs keep on rising. casual
少子高齢化しょうしこうれいかが進すすみ、労働人口ろうどうじんこうは減へる一方いっぽうです。
shoushikoureika ga susumi, roudoujinkou wa heru ippou desu.
As the population ages and the birth rate falls, the working population keeps on shrinking. formal

How it's formed1

All forms2

past一方いっぽうだったippoudatta
上あがる一方いっぽうだった
polite一方いっぽうですippoudesu
上あがる一方いっぽうです

Notes

Only a few verbs sound natural here (上あがる／増ふえる／悪化あっかする…). The verb
stays dictionary form even for a past trend (上あがる一方いっぽうだった, never ×上あがった一方いっぽうだった).