Alternative form of 三つの密 (mittsu no mitsu)

choosing one of three options

three households / the three pairs of head orifices (eye sockets, nostrils, earholes)

A district of Aomori Prefecture, Japan, Asia / A town in Sannohe district, Aomori Prefecture, Japan, Asia

three dimensions, three-dimensional

triangular prism

three years; the third year / (education) the third school year / (figuratively) a long period of time, several years

three years; triennial / three years old

three years of age, three years old

You should treasure every encounter, for it will never recur.