Vocabulary consisting only from characters you are able to read
変人
へんじん
eccentric, crank, oddballmix
大変
たいへん
awful, dreadful, terrible, very, seriousadj, jlpt5
実学
じつがく
practical sciencemix
持参
じさん
bringing, taking, carryingsuru
投入
とうにゅう
(1)throwing (e.g. something into somewhere), (2)investment, putting in (personnel, etc.), (3)release of a product, (4)making (an electrical circuit) suru
長年
ながねん
long time, many yearstoki