decimal system

to put into practice, to carry out, to execute (a plan etc.), to put into effect, to put into force (a law etc.)

substance; essence

one's own child

one's elder sister

Kyūjitai form of 実施 (“practice; execution; enforcement; putting into effect”)

appeasement policy

nanshin, Imperial Japan's policy of southern expansionism towards southeast Asia and the Pacific Islands

the first sight of something / something seen for the first time

one should start a big project with immediate, practical steps; start small / the person who proposes something should be the first one to take practical steps to implement it