清

Slang; Derogatory

neat and tidy woman who is (unexpectedly) promiscuous

Company name

Nissin Foods

Company name

Shimizu Corporation

serotherapy

harmony, respect, purity and tranquility; the four most important elements of the tea ceremony

garbage processing plant; waste incineration plant

serum injection

Medicine

serum hepatitis

refreshing breeze and the bright moon; a beautiful nocturnal scene with a full moon

Proverb

the morally upright have a hard time making friends; fish will not live in water that is (too) clean

Organization name

Tsinghua University

Legend

(The Story of) Anchin & Kiyohime; The Hidaka River Legend

waiting for one hundred years for the waters of the Yellow River to clear; waiting in vain for an unlikely event; waiting for pigs to fly; when the sky falls, we shall catch larks

Company name

Kagakuoyobi Kesseiryōhou Kenkyūsho (corporate name of Kaketsuken); Chemo-Sero-Therapeutic Research Institute

Chungcheongnam-do (South Korea); South Chungcheong Province

Work of art, literature, music, etc. name

Pure Rules of Huaihai (set of monastery regulations said to have been written by Baizhang Huaihai)

mouth freshener; oral deodorant

rocket (Eruca sativa); ruccola; arugula

Organization name

Notre Dame Seishin University

immune serum

Chungcheongbuk-do (South Korea); North Chungcheong Province

to feel purified

pure and innocent; immaculate

Medicine

serum concentration