Lower back and legs

Lets you describe back pain and leg injuries.

Mix-ups koshi is the lower back, not the whole back (senaka).

koshi

lower back; hips

Back pain is usually koshi, not senaka.

casual

nimotsu mochiagete koshi itameta

I hurt my back lifting the bags.

荷物持ち上げて腰痛めた

polite

nimotsu o mochiagete koshi o itamemashita

I hurt my back lifting the bags.

荷物を持ち上げて腰を痛めました

Written 腰 · こしRank #2126 in 3,030 TV dramas

knee; lap

Hiza no ue means on your lap.

casual

koronde hiza o surimuichatta

I fell and scraped my knee.

転んで膝を擦りむいちゃった

polite

koronde hiza o surimukimashita

I fell and scraped my knee.

転んで膝を擦りむきました

Written 膝 · ひざRank #5219 in 3,030 TV dramas

bottom; backside

The everyday word; shiri alone is cruder.

casual

zutto suwatteta kara oshiri itai

My bum hurts from sitting all day.

ずっと座ってたからお尻痛い

polite

zutto suwatte ita node oshiri ga itai desu

My bottom hurts from sitting all day.

ずっと座っていたのでお尻が痛いです

Written お尻 · おしりRank #4530 in 3,030 TV dramas