inner part

wife

wife

inner heart

ace up one's sleeve ②secret skills ③left hand

deep in the mountains

lady

profound ②deep (of a cave, etc.)

deep in the forest

molars

depths ②bottom (of one's heart)

interior

remote mountain

refined

late-growing rice ②late-ripening crops ③late developer (e.g. child who reaches puberty late)

depth

rear right (corner, etc.)

depth

lady of the house

left back (corner, etc.)

secret techniques (of an art or skill)

Ōu (the two former provinces of Mutsu and Dewa)

deep inside

esoteric doctrines

secrets

esoteric writings

secret

deep truth

one's heart of hearts

inner part

secret knowledge

secrets

Ordovician period

Rikuō (former province located in parts of present-day Aomori and Iwate prefectures)

Mutsu (former province located in present-day Fukushima, Miyagi, Iwate, and Aomori prefectures)