幹 - tree trunk, main part, talent

Shinkansen; bullet train

foundation; root; basis; core; fundamentals

tree trunk; bole

executive secretary; coordinator; organizer; person in charge of making arrangements

chief editor; managing editor

management; (executive) staff; leaders; leadership; top brass; upper echelons

mainstay; nucleus; key

main line; trunk line

stem (non-inflecting part of a word); word stem

Linear Chūō Shinkansen

brain stem

trunk; shaft