枕

pillow

small sweet rice cakes placed at the bedside of the deceased

memory foam pillow

air cushion

trading sexual favours (for career advancement, etc.)

bedside

using one's arm as a pillow

lying with one's head to the north (trad. position for dead bodies; taboo for sleeping)

(untalented) geisha who sells sex

water-filled pillow

wooden pillow

(railway) sleeper

high pillow

pillow fight

neck pillow

The Pillow Book (Heian-period collection of writings by Sei Shōnagon)

bridal bed

sutra recitation at the bedside of a deceased person

bringing out the pillows and futon (in Zen Buddhism)

to sleep together (for a man and a woman)

lonely in bed

bedside

bedding

to appear in one's dream (of a deity or deceased; to advise, admonish, etc.)

to sleep in peace

caruncle

bedroom theft or thief

to sleep in peace

private diary

place that is often written about in waka poetry

makuragaeshi

pillow lava

oval pad with two long strips tied underneath the obi to make it look fuller

sleeping while on a sea voyage

bedside

sleeping away from home

body pillow

to live freely in the wilderness

sore loser who stubbornly refuses to admit being wrong

sore loser who stubbornly refuses to admit being wrong

to refuse stubbornly to admit one is wrong

nap

overnight stay when traveling (travelling)

pillow stuffed with buckwheat chaff, rice husks or similar material

at the bedside where one dreams

pillow money

cooked rice placed at the bedside or grave of the deceased

thumb joint where an arrow rests (archery)

bedding

using one's arms as a pillow

pillow stuffed with chrysanthemum petals (allegedly good for headaches)

cooling pillow (often rubber)

bed(side) screen

pillow made from bamboo or cane (for use during the summer)

temporary altar at the bedside of a deceased person

pillow with a box-shaped wooden base

resting one's head on one's arm or elbow

porcelain pillow (used in summer)

ice pillow

pillowcase

Japanese sea biscuit (Clypeaster japonicus)

using the sleeves of one's kimono as a pillow

pillow fight

erotic picture

pillow word

chopstick rest

laying one's head in someone's lap

voyage

to cry in bed