反核: anti-nuclear / 半角: half-width (characters), usually romaji or katakana

Shimeji mushroom

culture medium

版権: publishing rights / 半券: stub (of a ticket)

Kyūjitai form of 地区: zone (area distinguished on the basis of a particular characteristic etc)

(ecology) habitat

半弓: shortbow / 半休: a half-holiday, a half day / 半球: hemisphere / 班給: division and provision, splitting and giving

班給: to divide something up and provide portions to others

半弓: shortbow

epicenter(AmE), epicentre(BrE) - the point on the Earth's surface directly above the focus of an earthquake. / (figuratively) The focal point of any activity, especially if dangerous or destructive .