幹

executive secretary

management

Shinkansen

(tree) trunk

foundation

chief editor

main line

mainstay

trunk (of the body)

board of governors

board of directors

leading members of a party

chief secretary (usu. of a party)

backbone chain (polymer)

core system

main current

stem (non-inflecting part of a word)

Ground Staff College

senior leadership

Japanese timber bamboo (Phyllostachys bambusoides)

brain stem

trunk cable

natural note (i.e. not sharp or flat)

mission-critical task

mini-shinkansen

key industry

lower brainstem

senior executive staff

senior chief engineer

Tōhoku Shinkansen

main road

Kyushu Shinkansen

editor-in-chief

Chūō Shinkansen

Linear Chūō Shinkansen

penis

skeleton

trunk coupling unit

main road

National Critical Technology

main supply route

Tōkaidō Shinkansen

Ground Officer Candidate School

Hokkaido Shinkansen

trunk

San'yō Shinkansen

hemp reed

Acer ukurunduense (species of Asian maple)

Jōetsu Shinkansen

ability

thematic vowel

leader line

stem cell

stem (word)

Scirpus yagara (species of club-rush)

induced pluripotent stem cell

hematopoietic stem cell

stem (of a note)

Gastrodia elata (species of saprophytic orchid)

national development arterial expressway

body

Air Staff College

induced pluripotent stem cell

caudex (of a plant)

embryonic stem cell

embryonic stem cell

femoral diaphyseal fracture

Air Officer Candidate School