頭

gag reflex

Proverb

too many cooks spoil the broth; too many captains will steer the ship up a mountain

Sumo

two highest ranked maegashira wrestlers

Proverb

the more learned, the more humble; the boughs bearing the most hang lowest

primacy effect

intracranial injury

Medicine

intracranial pressure

streetside fundraising

bald head

to turn one's head; to look over one's shoulder; to turn around; to look back

to think back (on); to reminisce; to look back (on); to reflect (on)

carrying out (political) propaganda activity on the streets

sweet crescent-shaped confection of pancake-like sponge cake filled with adzuki paste

Chinese dumpling; Chinese steamed bun

first author

oligarchy

Proverb

you cannot win against someone who doesn't listen to reason; you can't fight City Hall

keeping the head cool and feet warm

biceps femoris muscle

Sumo

functionary charged with training and organizing young wrestlers

cluster headache

(with) unkempt hair and dirty face; being indifferent to one's personal appearance

(recorded) man-on-the-street interview

Imaizumi's horseshoe bat (Rhinolophus imaizumii); Iriomote horseshoe bat

tension headache

Astronomy

Horsehead Nebula