背中に

on the back

→ 背中
phrase Uncommon #16,837
on the back 背中 means “back,” and に marks the location or thing affected. The phrase can refer to something located on the back, felt in the back, or carried on the back.
JA: 重い荷物を背中に背負って歩いた。
EN: I felt a sharp pain in my back.

背中に塗っていいよ

You can put it on my back.

— アバウト・タイム ~愛おしい時間について~ (2013)

おまえの祖国背中に火が付いてる

Your homeland has a fire under its ass.

— Брат 2 (2000)

彼女の視線を背中に感じた

I could feel her eyes on my back.

誰かひじが私の背中に当たった

Someone's elbow hit my back.

このブラウスボタンが背中にある

This blouse has buttons in the back.

背中に乗れ

Climb on my back.

— ソング・オブ・ザ・シー 海のうた (2014)

ようお前背中にネギ付いてる

Hey, you’ve got a green onion stuck to your back.

— 万引き家族 (2018)

俺の背中に立つ

Don't stand behind me.

— レザボア・ドッグス (1992)

背中に痛みを感じる

I feel pain in my back.

青い鳥はその背中に青空を背負って来る

The bluebird arrives carrying the blue sky on its back.

日本女性は赤ん坊を背中におんぶする

Japanese women carry babies on their backs.

背中に文字が何て意味

What does the writing on the back mean?

— どん底作家の人生に幸あれ! (2019)