Vocabulary consisting only from characters you are able to read
工夫
くふう
(1)scheme, device, scheming, devising, figuring out, coming up with, solving ingeniously, (2)dedication to spiritual improvement (esp. through Zen meditation); (sens) labourer, laborer, blue-collar suru
建国
けんこく
founding of a nationsuru
流す
ながす
(1)to drain, to pour, to spill, to shed (blood, tears), (2)to wash away, (3)to distribute (e.g. electricity over wires, music over a PA system, etc.), to circulate, to broadcast, to beam, (4)to cr godan, jlpt3, verb, vtrans
最大化
さいだいか
maximization, maximisationsuru
長野県
ながのけん
Nagano prefecture (Chuubu area)namae