paperweight / (computing slang, figuratively) brick (an electronic device, especially a heavy box-shaped one, that has become non-functional or obsolete)

anvil

biker gang, outlaw motorcycle club; group of hot-rodders

custom, custom-made / customs (duties or government agency)

Kashō era (June 848-April 851)

an cathode

Short for 春日井市 (Kasugai-shi): A city in northwestern Aichi Prefecture / a surname

(computing) virtual machine

(Internet slang, derogatory) Twittard

castella, a type of sponge cake